US Patent Class 340
COMMUNICATIONS: ELECTRICAL
 Electronic File Wrappers |  Electronic Patent Documents |  Paper Patent Documents | Current as of: June, 1999
|  and Services |
| Electronic File Wrappers | Electronic Patent Documents | Paper Patent Documents | Current as of: June, 1999
| and Services |
| DF | CLASS NOTES | |
| 850 | DF | UNDERWATER |
| 851 | DF | .~ Ship guidance system |
| 852 | DF | .~ Electrodes and electrode systems |
| 853.1 | DF | WELLBORE TELEMETERING OR CONTROL (E.G., SUBSURFACE TOOL GUIDANCE, DATA TRANSFER, ETC.) |
| 853.2 | DF | .~ Diagnostic monitoring or detecting operation of communications equipment or signal |
| 853.3 | DF | .~ Selective control of subsurface equipment |
| 853.4 | DF | .~.~ In horizontal or inclined drilling or passage |
| 853.5 | DF | .~.~.~ Control of drilling apparatus using magnetic field |
| 853.6 | DF | .~.~ Control of drill bit or apparatus (e.g., steering, speed, etc.) |
| 853.7 | DF | .~ Repeater in subsurface link (e.g., cable, etc.) |
| 853.8 | DF | .~ With orientation sensing of subsurface telemetering equipment (other than drilling equipment) |
| 853.9 | DF | .~ Including detail of subsurface signal storage (e.g., memory, recorder, register, etc.) |
| 854.1 | DF | .~ With position or depth recording (e.g., line payout, equipment locator, etc.) |
| 854.2 | DF | .~.~ Location of collar or stuck tool |
| 854.3 | DF | .~ Using a specific transmission medium (e.g., conductive fluid, annular spacing, etc.) |
| 854.4 | DF | .~.~ Drill string or tubing support signal conduction |
| 854.5 | DF | .~.~ Wellbore casing or ground |
| 854.6 | DF | .~.~ Electromagnetic energy (e.g., radio frequency, etc.) |
| 854.7 | DF | .~.~.~ Optical link (e.g., waveguide, etc.) |
| 854.8 | DF | .~.~.~ Near field coupling (e.g., inductive, capacitive, etc.) |
| 854.9 | DF | .~.~ Cable or wire (e.g., conductor as support, etc.) |
| 855.1 | DF | .~.~.~ Coupling connection structural feature |
| 855.2 | DF | .~.~.~ Single conductor cable or wire |
| 855.3 | DF | .~ Multiplexed signals |
| 855.4 | DF | .~ Pulse or digital signal transmission |
| 855.5 | DF | .~.~ Digital signal processing in subsurface transmitter |
| 855.6 | DF | .~.~.~ Having acoustic sensor |
| 855.7 | DF | .~ Modification of signal bandwidth, frequency, or circuit impedance at subsurface location |
| 855.8 | DF | .~ Including specified power transmission feature or source (e.g., battery, etc.) |
| 855.9 | DF | .~.~ Specified alternating current (A.C.) circuit feature |
| 856.1 | DF | .~ In horizontal or inclined passage arrangement |
| 856.2 | DF | .~ With expandable or inflatable sensor element or mounting |
| 856.3 | DF | .~ Including particular sensor |
| 856.4 | DF | .~.~ Acoustic or vibratory (e.g., sonic, fluidic, etc.) |
| 870.01 | DF | CONTINUOUSLY VARIABLE INDICATING (E.G., TELEMETERING) |
| 870.02 | DF | .~ With meter reading |
| 870.03 | DF | .~.~ Having plural transmitters |
| 870.04 | DF | .~ With calibration |
| 870.05 | DF | .~ With calculation |
| 870.06 | DF | .~.~ Plural transmitters (e.g., ratio) |
| 870.07 | DF | .~ Combined (TM system with other system) |
| 870.08 | DF | .~.~ Radio dial |
| 870.09 | DF | .~.~ With alarm or annunciator (concurrent with TM) |
| 870.1 | DF | .~ For radio sonde |
| 870.11 | DF | .~ Plural transmitters |
| 870.12 | DF | .~.~ Frequency division multiplex |
| 870.13 | DF | .~.~ Time division multiplex |
| 870.14 | DF | .~.~.~ Using particular sync |
| 870.15 | DF | .~.~ With plural receiver |
| 870.16 | DF | .~ Condition responsive |
| 870.17 | DF | .~.~ Temperature |
| 870.18 | DF | .~ Using a particular modulation (e.g., phase, frequency, or amplitude) |
| 870.19 | DF | .~.~ Pulse |
| 870.2 | DF | .~.~.~ Pulse repetition |
| 870.21 | DF | .~.~.~ Analog to digital function converter |
| 870.22 | DF | .~.~.~ Permutation code |
| 870.23 | DF | .~.~.~ Increase pulses plus decrease pulses |
| 870.24 | DF | .~.~.~ Pulse duration (e.g., pulse train) |
| 870.25 | DF | .~ Phase variation |
| 870.26 | DF | .~ Frequency variation |
| 870.27 | DF | .~ Plural circuits, each for particular magnitude |
| 870.28 | DF | .~ Via radiant energy beam (via particular energy) |
| 870.29 | DF | .~.~ Photoelectric cell pickup |
| 870.3 | DF | .~ With particular transmitter (e.g., piezoelectric, dynamo) |
| 870.31 | DF | .~.~ Inductive transmitter |
| 870.32 | DF | .~.~.~ Mutual inductance |
| 870.33 | DF | .~.~.~.~ Flux valve type (e.g., with movable saturating magnet) |
| 870.34 | DF | .~.~.~.~ Self-synchronous type |
| 870.35 | DF | .~.~.~.~ Differential type |
| 870.36 | DF | .~.~.~.~.~ Linear variable differential transformer (LVDT) |
| 870.37 | DF | .~.~ Capacitive transmitter |
| 870.38 | DF | .~.~ Resistive transmitter |
| 870.39 | DF | .~ With supply voltage regulation or compensation |
| 870.4 | DF | .~ With particular receiver (e.g., ratiometer) |
| 870.41 | DF | .~.~ Plural receivers |
| 870.42 | DF | .~.~ With feedback (e.g., reflex along line) |
| 870.43 | DF | .~.~.~ Follow-up (e.g., circuit rebalanced when upset) |
| 870.44 | DF | .~.~ With discharge device (e.g., CRT) |
| 901 | DF | EXTERNAL CONDITION VEHICLE-MOUNTED INDICATOR OR ALARM |
| 902 | DF | .~ Transmitter in another vehicle (e.g., emergency vehicle) |
| 903 | DF | .~.~ Relative distence between vehicles (e.g., collision alert) |
| 904 | DF | .~ Transmitter in one vehicle only |
| 905 | DF | .~ Highway information (e.g., weather, speed limits, etc.) |
| 906 | DF | OVERRIDE OF TRAFFIC CONTROL INDICATOR BY COMMAND TRANSMITTER |
| 907 | DF | TRAFFIC CONTROL INDICATOR |
| 908 | DF | .~ Portable |
| 908.1 | DF | .~.~ Barricade marker |
| 909 | DF | .~ Plural intersections under common central station control |
| 910 | DF | .~.~ Central station responsive to traffic detectors |
| 911 | DF | .~.~.~ Central station controls offset (time between beginning of same phase at adjacent intersections) |
| 912 | DF | .~.~ Standby cycling implemented if invalid transmission received or loss of transmission occurs |
| 913 | DF | .~.~ Offset control |
| 914 | DF | .~.~ Split control |
| 915 | DF | .~.~ Central station includes display of status of indicators |
| 916 | DF | .~ Intersection normally under local controller |
| 917 | DF | .~.~ Controller responsive to traffic detectors |
| 918 | DF | .~.~.~ Controller, when changing right of way, alters or skips normal "go" cycle of street having no traffic detected |
| 919 | DF | .~.~.~ Plural cross highways at intersection each have traffic detectors |
| 920 | DF | .~.~.~.~ Density determines split |
| 921 | DF | .~.~.~.~.~ Extension of time |
| 922 | DF | .~.~.~ Density determines split |
| 923 | DF | .~.~.~ Extension of time |
| 924 | DF | .~.~ Local controller can be superceded by central station controller |
| 925 | DF | .~.~ Pedestrian control |
| 926 | DF | .~.~ Manual setting of cycle length and split times |
| 927 | DF | .~.~ Rotating cam structure (specific structure required) |
| 928 | DF | .~ Combined (e.g., toll systems, one-way) |
| 929 | DF | .~ Indication of time remaining before change of phase |
| 930 | DF | .~.~ Electromechanical movable auxiliary indicator |
| 931 | DF | .~ Traffic control or local controller failure indicator |
| 932 | DF | .~ Pacing (e.g., vehicle keeps pace with sequentially activated lights) |
| 932.1 | DF | .~ Pivoted |
| 932.2 | DF | VEHICLE PARKING INDICATORS |
| 933 | DF | VEHICLE DETECTORS |
| 934 | DF | .~ Density |
| 935 | DF | .~ Discriminates vehicle direction |
| 936 | DF | .~ Speed and overspeed |
| 937 | DF | .~ With camera |
| 938 | DF | .~ Compensation for vehicle remaining at sensor position |
| 939 | DF | .~ Environmental or drift compensation |
| 940 | DF | .~ With pneumatic |
| 941 | DF | .~ Inductive |
| 942 | DF | .~ Photoelectric |
| 943 | DF | .~ Sonic or ultrasonic |
| 944 | DF | PEDESTRIAN GUIDANCE |
| 945 | DF | AIRCRAFT ALARM OR INDICATING SYSTEMS |
| 946 | DF | .~ Nonairplane (e.g., balloon or helicopter) |
| 947 | DF | .~ Land-based landing guidance |
| 948 | DF | .~.~ Aircraft actuation of land-based landing guides |
| 949 | DF | .~.~ Wind direction |
| 950 | DF | .~.~ Movable (e.g., rotatable) guides |
| 951 | DF | .~.~ Phased landing guidance (e.g., runway approach, landing, touchdown) |
| 952 | DF | .~.~ Particular energy guide source (e.g., sound, electric field, radio) |
| 953 | DF | .~.~.~ Visual source |
| 954 | DF | .~.~.~.~ Alignment of plural sources |
| 955 | DF | .~.~.~.~ Plural colors |
| 956 | DF | .~.~.~.~ Modulated light source |
| 957 | DF | .~.~.~ Magnetic field guide |
| 958 | DF | .~ Docking guidance |
| 959 | DF | .~ Takeoff indicator |
| 960 | DF | .~ Landing gear indicator |
| 961 | DF | .~ Potential collision with other aircraft |
| 962 | DF | .~ Icing indicator |
| 963 | DF | .~ Flight alarm |
| 964 | DF | .~.~ Phased warnings for same flight condition |
| 965 | DF | .~.~ Tactile |
| 966 | DF | .~.~ Stall |
| 967 | DF | .~.~ Attitude (including yaw, angle of attack, roll, pitch, glide slope) |
| 968 | DF | .~.~ Wind shear |
| 969 | DF | .~.~ Speed |
| 970 | DF | .~.~ Altitude |
| 971 | DF | .~ Nonalarm flight indicator |
| 972 | DF | .~.~ Runway presentation |
| 973 | DF | .~.~ Indicator of at least four flight parameters (altitude, speed, etc.) |
| 974 | DF | .~.~ Attitude |
| 975 | DF | .~.~.~ Roll or pitch |
| 976 | DF | .~.~.~ Glide slope or path |
| 977 | DF | .~.~ Altitude |
| 978 | DF | .~.~ Speed |
| 979 | DF | .~.~ Heading (includes deviation from desired course) |
| 980 | DF | .~.~ Indicator visible in pilot's line of sight through windscreen |
| 981 | DF | .~ Aircraft beacons |
| 982 | DF | .~.~ Lights communicate (e.g., direction, altitude, reference position to observer) |
| 983 | DF | .~ Obstruction beacon |
| 984 | DF | WATERCRAFT ALARM OR INDICATING SYSTEMS |
| 985 | DF | .~ Navigation guides (e.g., channel lights) |
| 986 | DF | .~ Anchor movement |
| 987 | DF | .~ Rudder position indicator |
| 988 | DF | VEHICLE POSITION INDICATION |
| 989 | DF | .~ At remote location |
| 990 | DF | .~.~ With map display |
| 991 | DF | .~.~ Position indication transmitted by vehicle after receipt of information from local station |
| 992 | DF | .~.~ Position indication transmitted at periodic intervals (e.g., distance travelled) |
| 993 | DF | .~.~ Position indication transmitted by local station to remote location |
| 994 | DF | .~.~ Vehicle's arrival or expected arrival at remote location along route indicated at that remote location (e.g., bus arrival systems) |
| 995 | DF | .~ Map display |
| 996 | DF | .~ Prerecorded message describes position |
| 425.5 | DF | LAND VEHICLE ALARMS OR INDICATORS |
| 426 | DF | .~ Of burglary or unauthorized use |
| 427 | DF | .~.~ Of motorcycles or bicycles |
| 428 | DF | .~.~ Responsive to changes in voltage or current in a vehicle electrical system |
| 429 | DF | .~.~ Responsive to inertia, vibration, or tilt |
| 430 | DF | .~.~ With entrance/exit time delay |
| 431 | DF | .~ For trailer |
| 432 | DF | .~ For bicycle |
| 433 | DF | .~ For school bus |
| 434 | DF | .~ For taxi |
| 435 | DF | .~ Of relative distance from an obstacle |
| 436 | DF | .~ Of collision or contact with external object |
| 437 | DF | .~.~ Curb |
| 438 | DF | .~ Internal alarm or indicator responsive to a condition of the vehicle |
| 439 | DF | .~.~ Operation efficiency (e.g., engine performance, driver habits) |
| 440 | DF | .~.~ Tilt, imbalance, or overload |
| 441 | DF | .~.~ Speed of vehicle, engine, or power train |
| 442 | DF | .~.~ Tire deflation or inflation |
| 443 | DF | .~.~.~ By indirect detection means (e.g., height measurement) |
| 444 | DF | .~.~.~.~ Relative wheel speed |
| 445 | DF | .~.~.~ With particular telemetric coupling |
| 446 | DF | .~.~.~.~ Acoustic wave |
| 447 | DF | .~.~.~.~ Radio wave |
| 448 | DF | .~.~.~.~ Inductive |
| 449 | DF | .~.~ Temperature |
| 450 | DF | .~.~ Fluid level |
| 450.1 | DF | .~.~.~ Of hydraulic brake fluid |
| 450.2 | DF | .~.~.~ Of fuel |
| 450.3 | DF | .~.~.~ Of lubricant (e.g., engine oil) |
| 451 | DF | .~.~ Fluid pressure |
| 452 | DF | .~.~.~ Of brake fluid |
| 453 | DF | .~.~ Brake or clutch condition |
| 454 | DF | .~.~.~ Wear |
| 455 | DF | .~.~ Battery charging system condition |
| 456 | DF | .~.~ Gear position |
| 457 | DF | .~.~ Reminder |
| 457.1 | DF | .~.~.~ Of seat belt application |
| 457.2 | DF | .~.~.~ Of headlight energization |
| 457.3 | DF | .~.~.~ Of parking brake application |
| 457.4 | DF | .~.~.~ Of service interval expiration |
| 458 | DF | .~.~ Lamp or lamp circuit condition |
| 459 | DF | .~.~ Plural conditions |
| 460 | DF | .~.~.~ With voice warning |
| 461 | DF | .~.~.~ With particular display means |
| 462 | DF | .~.~.~.~ Digital |
| 463 | DF | .~ External alarm or indicator of movement |
| 464 | DF | .~.~ Plural indications (e.g., go, slow, stop) |
| 465 | DF | .~.~ Turning or steering |
| 466 | DF | .~.~ Speed |
| 467 | DF | .~.~ Acceleration or deceleration |
| 468 | DF | .~ External signal light system |
| 469 | DF | .~.~ With two or more intensity levels (e.g., day or night) |
| 470 | DF | .~.~ Pass - no pass |
| 471 | DF | .~.~ Hazard warning or distress signalling |
| 472 | DF | .~.~.~ Auxiliary signal permanently attached to vehicle |
| 473 | DF | .~.~.~ Portable signal |
| 474 | DF | .~.~ With audible signal |
| 475 | DF | .~.~ Turn signal |
| 476 | DF | .~.~.~ With automatic cancelling |
| 477 | DF | .~.~.~.~ By predetermined time interval or distance |
| 478 | DF | .~.~.~ With plural bulbs sequentially flashed |
| 479 | DF | .~.~ Brake light |
| 480 | DF | .~ Electromagnetically actuated mechanical signal |
| 481 | DF | .~.~ Wigwag type |
| 482 | DF | .~.~ Normally encased |
| 483 | DF | .~.~.~ Plural concurrent indicators |
| 484 | DF | .~.~.~ Sliding sign or shutter |
| 485 | DF | .~.~.~ Window exhibited sign or shutter |
| 486 | DF | .~.~.~.~ Drum |
| 487 | DF | .~.~ Pivoting |
| 488 | DF | .~.~.~ Multiple indicators |
| 489 | DF | .~.~.~ Three or more positions |
| 490 | DF | .~.~.~.~ Vertical axis |
| 146.2 | DF | DIGITAL COMPARATOR SYSTEMS |
| 500 | DF | CONDITION RESPONSIVE INDICATING SYSTEM |
| 501 | DF | .~ With particular system function (e.g., temperature compensation, calibration) |
| 502 | DF | .~.~ Acknowledgement |
| 503 | DF | .~.~.~ With ringback |
| 504 | DF | .~.~ Answer-back |
| 505 | DF | .~.~ Interrogator-responder |
| 506 | DF | .~.~ Alarm system supervision |
| 507 | DF | .~.~.~ Fail-safe |
| 508 | DF | .~.~.~ Redundant (e.g., added circuit or loop) |
| 509 | DF | .~.~.~ Plural or diverse current sources |
| 510 | DF | .~.~.~ Bridge or potential divider |
| 511 | DF | .~.~.~ Threshold or window (e.g., of analog electrical level) |
| 512 | DF | .~.~.~ Pulse |
| 513 | DF | .~.~.~ Diode |
| 514 | DF | .~.~ Testing |
| 515 | DF | .~.~.~ Simulation of condition |
| 516 | DF | .~.~.~ Automatic (e.g., periodic, start-up) |
| 517 | DF | .~.~ Selection from a plurality of sensed conditions |
| 518 | DF | .~.~.~ Scanning |
| 519 | DF | .~.~.~ Worst condition |
| 520 | DF | .~.~.~ First sensed exclusively indicated |
| 521 | DF | .~.~.~ Plural diverse conditions |
| 522 | DF | .~.~.~.~ Combined for response |
| 523 | DF | .~.~.~ Particular sequence of conditions |
| 524 | DF | .~.~.~ Condition position indicator |
| 525 | DF | .~.~.~.~ Display board |
| 526 | DF | .~.~ Predetermined rate of occurrence |
| 527 | DF | .~.~ Time delay |
| 528 | DF | .~.~.~ Entrance/exit |
| 529 | DF | .~.~.~ Condition persistence |
| 530 | DF | .~.~.~.~ Capacitor |
| 531 | DF | .~ With particular coupling link |
| 532 | DF | .~.~ Having particular safety function |
| 533 | DF | .~.~ Wired |
| 534 | DF | .~.~.~ Coded message |
| 535 | DF | .~.~.~.~ Mechanical code means (e.g., coded disc) |
| 536 | DF | .~.~.~ Noninterfering |
| 537 | DF | .~.~.~ With impedance level coding |
| 538 | DF | .~.~.~ Combined with power line |
| 539 | DF | .~.~ Radio |
| 540 | DF | .~ Specific condition |
| 541 | DF | .~.~ Intrusion detection |
| 542 | DF | .~.~.~ Lock |
| 543 | DF | .~.~.~.~ Permutation |
| 544 | DF | .~.~.~ Disturbance of fluid pressure |
| 545.1 | DF | .~.~.~ Door or window movement |
| 546 | DF | .~.~.~.~ Portable |
| 545.2 | DF | .~.~.~.~ Specified sensor |
| 547 | DF | .~.~.~.~.~ Magnetic sensor |
| 548 | DF | .~.~.~.~.~ Plug or cord tension sensor |
| 549 | DF | .~.~.~.~.~ Rotatable sensor |
| 545.3 | DF | .~.~.~.~.~ Sensing of electromagnetic energy (e.g., light, infrared, or microwave) |
| 545.4 | DF | .~.~.~.~.~ Sensing of electrical parameter (e.g., piezoelectricity or capacitance) |
| 545.5 | DF | .~.~.~.~.~ Inertia-type sensor (e.g., mercury or pendulum switch) |
| 545.6 | DF | .~.~.~.~ Door, cover, or lid for self-contained article (e.g., refrigerator, mailbox, drawer, cabinet, or box) |
| 545.7 | DF | .~.~.~.~ Specified door or window portion (e.g., doorknob) |
| 545.8 | DF | .~.~.~.~ Specified door or window attachment (e.g., shade or blind) |
| 545.9 | DF | .~.~.~.~ Plural doors or windows |
| 550 | DF | .~.~.~ Partition penetration |
| 551 | DF | .~.~.~ Disturbance of magnetic field |
| 552 | DF | .~.~.~ Disturbance of electromagnetic waves |
| 553 | DF | .~.~.~.~ Standing waves |
| 554 | DF | .~.~.~.~ Doppler effect |
| 555 | DF | .~.~.~.~ Light |
| 556 | DF | .~.~.~.~.~ Beam |
| 557 | DF | .~.~.~.~.~.~ Laser |
| 561 | DF | .~.~.~ Disturbance of electric field |
| 562 | DF | .~.~.~.~ Capacitance |
| 563 | DF | .~.~.~.~.~ With bridge |
| 564 | DF | .~.~.~.~.~ Fence |
| 565 | DF | .~.~.~ Responsive to intruder energy |
| 566 | DF | .~.~.~.~ Vibration |
| 567 | DF | .~.~.~.~ Electromagnetic energy |
| 568.1 | DF | .~.~ Article placement or removal (e.g., anti-theft) |
| 568.2 | DF | .~.~.~ Signal-carrying conduit between sensor and article (e.g., cable, power cord, or data link) |
| 568.3 | DF | .~.~.~.~ Power cord |
| 568.4 | DF | .~.~.~.~ Specified connector (e.g., phone jack-type plug) |
| 568.5 | DF | .~.~.~ Shopping cart or item thereon |
| 568.6 | DD | .~.~.~ Sporting equipment (e.g., golfbag, club, cart, or skis) |
| 568.7 | DF | .~.~.~ Currency, credit card, or container therefor (e.g., wallet or handbag) |
| 568.8 | DF | .~.~.~ Article on pedestal, in display case, or mounted on wall (e.g., work of art) |
| 569 | DF | .~.~.~ Mailbox |
| 570 | DF | .~.~.~ Drawer |
| 571 | DF | .~.~.~ Alarm on protected article |
| 572.1 | DF | .~.~.~ Detectable device on protected article (e.g., "tag") |
| 572.2 | DF | .~.~.~.~ Specified relationship between field and detection frequencies (e.g., nth order harmonics) |
| 572.3 | DF | .~.~.~.~ Deactivatable by means other than mere removal |
| 572.4 | DF | .~.~.~.~ Specified processing arrangement for detected signal |
| 572.5 | DF | .~.~.~.~ Having tuned resonant circuit |
| 572.6 | DF | .~.~.~.~ Having "soft" magnetic element (e.g., Permalloy) |
| 572.7 | DF | .~.~.~.~ Specified antenna structure |
| 572.8 | DF | .~.~.~.~ Specified device housing or attachment means |
| 572.9 | DF | .~.~.~.~.~ Having means locking device to article |
| 573.1 | DF | .~.~ Human or animal |
| 574 | DF | .~.~.~ Holdup |
| 575 | DF | .~.~.~ Sleep |
| 576 | DF | .~.~.~ Drive capability |
| 573.2 | DF | .~.~.~ Nondomestic animal (e.g., for hunting, fishing, or repelling) |
| 573.3 | DF | .~.~.~ Domestic animal training, monitoring, or controlling |
| 573.4 | DF | .~.~.~ House arrest system, wandering, or wrong place |
| 573.5 | DF | .~.~.~ Incontinence or enuresis alarm |
| 573.6 | DF | .~.~.~ Water safety alarm |
| 573.7 | DF | .~.~.~ Posture alarm |
| 577 | DF | .~.~ Flame |
| 578 | DF | .~.~.~ By radiant energy |
| 579 | DF | .~.~.~ By ionization or conductivity |
| 580 | DF | .~.~ Ice formation |
| 581 | DF | .~.~.~ Thermal |
| 582 | DF | .~.~.~ Vibratory |
| 583 | DF | .~.~.~ Photoelectric |
| 584 | DF | .~.~ Thermal |
| 585 | DF | .~.~.~ Refrigerated storage |
| 586 | DF | .~.~.~ Portable |
| 587 | DF | .~.~.~ False alarm resistant |
| 588 | DF | .~.~.~ Time-temperature relationship (e.g., overtemperature exceeds predetermined interval or time-temperature integral) |
| 589 | DF | .~.~.~.~ Rate of temperature change |
| 590 | DF | .~.~.~ Fusible, frangible, or destructible sensor |
| 591 | DF | .~.~.~.~ Containing pressurized fluid |
| 592 | DF | .~.~.~ Expanding fluid sensor |
| 593 | DF | .~.~.~ Switch sensor |
| 594 | DF | .~.~.~.~ With bimetallic element |
| 595 | DF | .~.~.~ Current modifier or generator |
| 596 | DF | .~.~.~.~ Cable or elongated probe |
| 597 | DF | .~.~.~.~ Curie point sensor |
| 598 | DF | .~.~.~.~ Barrier-layer sensor |
| 599 | DF | .~.~.~.~ Bridge circuit |
| 600 | DF | .~.~ Radiant energy |
| 601 | DF | .~.~ Meteorological condition |
| 602 | DF | .~.~.~ Moisture or humidity (e.g., rain) |
| 603 | DF | .~.~ Fluent material |
| 604 | DF | .~.~.~ Wetness |
| 605 | DF | .~.~.~ Leakage |
| 606 | DF | .~.~.~ Flow rate |
| 607 | DF | .~.~.~.~ Filter clogging |
| 608 | DF | .~.~.~.~ Stoppage |
| 609 | DF | .~.~.~.~ Counting |
| 610 | DF | .~.~.~.~ Vane in flow path |
| 611 | DF | .~.~.~.~ Pressure |
| 612 | DF | .~.~.~ Material level |
| 613 | DF | .~.~.~.~ Weight in container |
| 614 | DF | .~.~.~.~ Pressure |
| 615 | DF | .~.~.~.~ Moving sensor (e.g., impeller) |
| 616 | DF | .~.~.~.~ Overflow |
| 617 | DF | .~.~.~.~ Pulverant material (e.g., bin) |
| 618 | DF | .~.~.~.~ Liquid |
| 619 | DF | .~.~.~.~.~ Optical sensor |
| 620 | DF | .~.~.~.~.~ Electrode probe |
| 621 | DF | .~.~.~.~.~ Having sonic sensor |
| 622 | DF | .~.~.~.~.~ Having heat sensor |
| 623 | DF | .~.~.~.~.~ Float sensor |
| 624 | DF | .~.~.~.~.~.~ Vertically reciprocable |
| 625 | DF | .~.~.~.~.~.~ Pivoted arm |
| 626 | DF | .~.~.~ Pressure |
| 627 | DF | .~.~.~ Particle suspension in fluid |
| 628 | DF | .~.~.~.~ Smoke |
| 629 | DF | .~.~.~.~.~ Ionization |
| 630 | DF | .~.~.~.~.~ Photoelectric |
| 631 | DF | .~.~.~.~ Lubricant |
| 632 | DF | .~.~.~ Gas |
| 633 | DF | .~.~.~.~ Catalytic detector |
| 634 | DF | .~.~.~.~ Semiconductor detector |
| 635 | DF | .~.~ Condition of electrical apparatus |
| 636 | DF | .~.~.~ Battery |
| 637 | DF | .~.~.~ Watt-hour meter |
| 638 | DF | .~.~.~ Fuse or circuit breaker |
| 639 | DF | .~.~.~.~ Plural |
| 640 | DF | .~.~.~ Heater element |
| 641 | DF | .~.~.~ Signalling light element |
| 642 | DF | .~.~.~.~ Plural bulbs or filaments |
| 643 | DF | .~.~.~.~ Thermal or magnetic current sensors |
| 644 | DF | .~.~.~ Switch or relay |
| 645 | DF | .~.~.~ Rectifier |
| 646 | DF | .~.~.~ Transformer |
| 647 | DF | .~.~.~ Insulation |
| 648 | DF | .~.~.~ Motor |
| 649 | DF | .~.~.~ Condition of intentional grounding circuit |
| 650 | DF | .~.~.~ Undesired circuit ground or short |
| 651 | DF | .~.~.~.~ For plural circuit conductors |
| 652 | DF | .~.~.~ Breaking of circuit continuity |
| 653 | DF | .~.~.~ Electronic circuit or component |
| 654 | DF | .~.~.~ Circuit energization |
| 655 | DF | .~.~.~.~ Heating circuit |
| 656 | DF | .~.~.~.~ Electrical socket |
| 657 | DF | .~.~ Electrical characteristic |
| 658 | DF | .~.~.~ Phase or frequency |
| 659 | DF | .~.~.~ Pulse or surge |
| 660 | DF | .~.~.~ Voltage |
| 661 | DF | .~.~.~.~ Comparison |
| 662 | DF | .~.~.~.~ Overvoltage |
| 663 | DF | .~.~.~.~ Undervoltage |
| 664 | DF | .~.~.~ Current |
| 665 | DF | .~.~ Force or stress |
| 666 | DF | .~.~.~ Weight |
| 667 | DF | .~.~.~.~ On seat |
| 668 | DF | .~.~.~ Tension |
| 669 | DF | .~.~ Acceleration |
| 670 | DF | .~.~ Velocity |
| 671 | DF | .~.~.~ Angular |
| 672 | DF | .~.~.~.~ Direction of shaft rotation |
| 673 | DF | .~.~ Article transport |
| 674 | DF | .~.~.~ Discrete articles |
| 675 | DF | .~.~.~ Web, film, or strip |
| 676 | DF | .~.~.~.~ Conveyor belt |
| 677 | DF | .~.~.~ Strand |
| 678 | DF | .~.~ Of geometrical gauge |
| 679 | DF | .~.~ Machine condition |
| 680 | DF | .~.~.~ Machine tool |
| 681 | DF | .~.~.~ Synchronization |
| 682 | DF | .~.~.~ Bearing |
| 683 | DF | .~.~.~ Vibration |
| 684 | DF | .~.~.~ Agricultural |
| 685 | DF | .~.~.~ Cranes |
| 686.1 | DF | .~.~ Position responsive |
| 687 | DF | .~.~.~ Connected or disconnected |
| 688 | DF | .~.~.~ Meter dial |
| 689 | DF | .~.~.~ Tilt |
| 690 | DF | .~.~.~ Geophysical (e.g., fault slip) |
| 686.2 | DF | .~.~.~ Alignment or misalignment |
| 686.3 | DF | .~.~.~ Shaft or rotary element |
| 686.4 | DF | .~.~.~ One article inserted into another |
| 686.5 | DF | .~.~.~ Workpiece |
| 686.6 | DF | .~.~.~ Proximity or distance |
| 691.1 | DF | .~ Specified indicator structure |
| 691.2 | DF | .~.~ Simulated effect |
| 691.3 | DF | .~.~ Degree or urgency |
| 691.4 | DF | .~.~ Plural |
| 691.5 | DF | .~.~.~ Diverse |
| 691.6 | DF | .~.~ Information display |
| 692 | DF | .~.~ Sound reproducer |
| 691.7 | DF | .~.~ Mechanical |
| 691.8 | DF | .~.~ Control circuit detail |
| 693.1 | DF | .~ Specified power supply |
| 693.2 | DF | .~.~ Substitute or emergency source (e.g., back-up battery) |
| 693.3 | DF | .~.~ Having reduced power consumption (e.g., intermittent power) |
| 693.4 | DF | .~.~ Having specified voltage regulator |
| 693.5 | DF | .~ Specified housing |
| 693.6 | DF | .~.~ Configured to promote sensing capability (e.g., smoke detector) |
| 693.7 | DF | .~.~.~ Inserted battery required for housing closure |
| 693.8 | DF | .~.~ Simulation |
| 693.9 | DF | .~.~ Having specified mounting structure |
| 693.11 | DF | .~.~.~ To wall or ceiling |
| 693.12 | DF | .~.~.~ Within another housing |
| 825 | DF | SELECTIVE |
| 825.01 | DF | .~ Spare channel |
| 825.02 | DF | .~ Tree or cascade |
| 825.03 | DF | .~ Channel selection |
| 826 | DF | .~.~ Plural stage matrix system (e.g., path finding) |
| 827 | DF | .~.~.~ Alternate routing |
| 825.04 | DF | .~.~ Code or pulse responsive |
| 825.06 | DF | .~ Monitoring and control (e.g., supervisory) |
| 825.07 | DF | .~.~ With addressing |
| 825.08 | DF | .~.~.~ Polling or roll call |
| 825.09 | DF | .~.~ Quiescent |
| 825.1 | DF | .~.~ Scanning |
| 825.11 | DF | .~.~.~ Continuous |
| 825.12 | DF | .~.~.~ Interrupted |
| 825.13 | DF | .~.~.~.~ Automatic |
| 825.14 | DF | .~.~ Synchronization |
| 825.15 | DF | .~.~ With storage or recording |
| 825.16 | DF | .~.~ Fault condition |
| 825.17 | DF | .~.~ With indicator |
| 825.18 | DF | .~.~ Relay |
| 825.19 | DF | .~ Communication or control for the handicapped |
| 825.2 | DF | .~ Synchronizing |
| 825.21 | DF | .~.~ With addressing |
| 825.22 | DF | .~ Program control |
| 825.23 | DF | .~.~ Machine tool |
| 825.24 | DF | .~.~ Of audio system |
| 825.25 | DF | .~ Audio system (e.g., by pulse signal) |
| 825.26 | DF | .~ Stock quotation |
| 825.27 | DF | .~.~ With information storage |
| 825.28 | DF | .~ Space allocation (e.g., vehicle seat, hotel reservation) |
| 825.29 | DF | .~.~ Remote terminal |
| 825.3 | DF | .~ Intelligence comparison |
| 825.31 | DF | .~.~ Authorization control (e.g., entry into an area) |
| 825.32 | DF | .~.~.~ With alarm or indication of improper access |
| 825.33 | DF | .~.~.~ Credit |
| 825.34 | DF | .~.~ Authentication (e.g., identity) |
| 825.35 | DF | .~.~ Commodity (e.g., vending) |
| 825.36 | DF | .~ Having indication or alarm (e.g., location indication) |
| 825.37 | DF | .~.~ Additional to other selective control |
| 825.38 | DF | .~.~ Party line |
| 825.39 | DF | .~.~.~ Selection by means of frequency |
| 825.4 | DF | .~.~.~ Selector or indicator, per se |
| 825.41 | DF | .~.~.~ Step-by-step impulse |
| 825.42 | DF | .~.~.~.~ Polarity controlled |
| 825.43 | DF | .~.~.~ Amplitude or polarity controlled |
| 825.44 | DF | .~.~ Code responsive (e.g., paging) |
| 825.45 | DF | .~.~.~ Distress signal alarm |
| 825.46 | DF | .~.~.~ Vibratory (tactual) alarm |
| 825.47 | DF | .~.~.~ Group call |
| 825.48 | DF | .~.~.~ Tone code |
| 825.49 | DF | .~.~ Location indication |
| 825.5 | DF | .~ Lockout or priority (programmed or variable) |
| 825.51 | DF | .~.~ Designated priority |
| 825.52 | DF | .~ Addressing |
| 825.53 | DF | .~.~ Plural part (e.g., digit) or repetitions |
| 825.54 | DF | .~ Interrogation response |
| 825.55 | DF | .~.~ Printout (e.g., logging) or display |
| 825.56 | DF | .~ With multidigit encoder |
| 825.57 | DF | .~ Pulse responsive actuation |
| 825.58 | DF | .~.~ Phase or frequency shift keying |
| 825.59 | DF | .~.~ Polarity |
| 825.6 | DF | .~.~ Pulse pairs |
| 825.61 | DF | .~.~ Having delay line |
| 825.62 | DF | .~.~ Serial |
| 825.63 | DF | .~.~.~ Pulse width |
| 825.64 | DF | .~.~.~ Pulse spacing (e.g., pulse repetition rate) |
| 825.65 | DF | .~.~.~ Counting |
| 825.66 | DF | .~.~.~.~ Relay |
| 825.67 | DF | .~.~.~.~ Counting chain |
| 825.68 | DF | .~.~.~ Shift register |
| 825.69 | DF | .~.~.~ Radio link |
| 825.7 | DF | .~ Phase responsive actuation |
| 825.71 | DF | .~ Frequency responsive actuation |
| 825.72 | DF | .~.~ Wireless link |
| 825.73 | DF | .~.~ Plural frequencies |
| 825.74 | DF | .~.~.~ Simultaneous |
| 825.75 | DF | .~.~.~ Permutation |
| 825.76 | DF | .~.~.~ Corresponding to distinct functions |
| 825.77 | DF | .~ Amplitude responsive actuation |
| 825.78 | DF | .~.~ Divided resistor |
| 825.79 | DF | .~ Matrix |
| 825.8 | DF | .~.~ Plural stage |
| 825.81 | DF | .~.~ Electroluminescent elements |
| 825.82 | DF | .~.~.~ Light-emitting diode |
| 825.83 | DF | .~.~ Programmable |
| 825.84 | DF | .~.~.~ Having fusible element |
| 825.85 | DF | .~.~ Semiconductor crosspoint |
| 825.86 | DF | .~.~.~ Integrated circuit |
| 825.87 | DF | .~.~.~ Logic |
| 825.88 | DF | .~.~.~ Bistable |
| 825.89 | DF | .~.~.~ Switching element |
| 825.9 | DF | .~.~.~ Transistor |
| 825.91 | DF | .~.~.~.~ Field effect transistor |
| 825.92 | DF | .~.~.~.~ Four or more elements |
| 825.93 | DF | .~.~.~.~ Plural |
| 825.94 | DF | .~.~.~ Diodes |
| 825.95 | DF | .~.~.~.~ Charge storage |
| 825.96 | DF | .~.~.~.~ Plural diodes at crosspoint |
| 825.97 | DF | .~ Having electron beam device |
| 825.98 | DF | .~ System having rectifier |
| 286.01 | DF | SYSTEMS |
| 286.02 | DF | .~ Network signaling |
| 286.03 | DF | .~.~ Speaking tube including circuit |
| 286.04 | DF | .~ Manual alarm telegraph; e.g., other than signal box type |
| 286.05 | DF | .~.~ Fire |
| 286.06 | DF | .~ Call station |
| 286.07 | DF | .~.~ Hospital |
| 286.08 | DF | .~.~ Hotel |
| 286.09 | DF | .~.~ Restaurant |
| 286.11 | DF | .~ Annunciator |
| 286.12 | DF | .~.~ Drop annunciator |
| 286.13 | DF | .~ Mimic |
| 286.14 | DF | .~.~ Mapping |
| 287 | DF | .~ Signal box type (e.g., to call messenger, plural fire alarm boxes) |
| 288 | DF | .~.~ Combined (e.g., alarm circuit over power line) |
| 289 | DF | .~.~.~ With fire extinguisher (e.g., CO2) |
| 290 | DF | .~.~.~ Engine house apparatus controlling (e.g., releases horses, starts motor) |
| 291 | DF | .~.~ Repeaters (e.g., from central to plural fire houses or to siren) |
| 292 | DF | .~.~ Circuit maintenance (e.g., fault alarm, faulty circuit substitution) |
| 293 | DF | .~.~ Variable signal (e.g., police and fire, first and third alarm) |
| 294 | DF | .~.~.~ Dial selector for variable signal |
| 295 | DF | .~.~ Noninterfering (prevents break-in by another box during transmission) |
| 296 | DF | .~.~.~ Key obstruction type |
| 297 | DF | .~.~ With signal at box (e.g., preliminary signal to combat false alarms) |
| 298 | DF | .~.~.~ Answer back signal acknowledges transmitted signal |
| 299 | DF | .~.~.~ Simultaneous (e.g., actuated by transmitted signal) |
| 300 | DF | .~.~.~ Lamp at box (e.g., to call patrolman) |
| 301 | DF | .~.~ Portable box actuating key (e.g., key must be released by signal from central) |
| 302 | DF | .~.~.~ Frangible guard or protector for key |
| 303 | DF | .~.~ Frangible element must be broken to send signal |
| 304 | DF | .~.~ False alarm combating (e.g., detention devices) |
| 305 | DF | .~.~ Local circuit to actuate box |
| 306 | DF | .~.~.~ Watchman's local circuit |
| 307 | DF | .~.~ Transmitters |
| 308 | DF | .~.~.~ Controlled by door of signal box |
| 309 | DF | .~.~.~ With make and break wheel |
| 309.15 | DF | .~ Timer controlled |
| 309.2 | DF | .~.~ With nonelectrical indicator or exhibitor |
| 309.3 | DF | .~.~ With diversely controlled indicator |
| 309.4 | DF | .~.~ Selectively or sequentially actuated indicators |
| 309.5 | DF | .~.~.~ With independent manual controller |
| 309.6 | DF | .~.~ Circuit maker-breaker in series |
| 310.01 | DF | .~ Signal over power line |
| 310.02 | DF | .~.~ Modulation technique |
| 310.03 | DF | .~.~ Noise reduction (e.g., filtering) |
| 310.04 | DF | .~.~.~ Zero crossing |
| 310.05 | DF | .~.~ Impedance matching (e.g., Y-match or delta match) |
| 310.06 | DF | .~.~ Bidirectional (e.g., with transceiver) |
| 310.07 | DF | .~.~ With inductive coupling (e.g., transformer or torroid) |
| 310.08 | DF | .~.~ With coupling plug |
| 311.1 | DF | .~ Paging |
| 313 | DF | .~ Answer back |
| 314 | DF | .~.~ Noncorrespondence alarm (e.g., if acknowledgement is incorrect) |
| 315 | DF | .~ Selsyn type |
| 316 | DF | .~ Rebalancing at receiver |
| 317 | DF | .~.~ Automatic rebalancing |
| 318 | DF | .~ Synchronous distributor at transmitter and receiver |
| 319 | DF | .~ Plural electromagnets or plural motors receiver |
| 320 | DF | .~ Via fluid conduit (e.g., fire hose) |
| 321 | DF | .~ Portable self-contained (e.g., movie usher's signalling flashlight) |
| 322 | DF | .~ Self-cancelling after fixed time |
| 323 R | DF | .~ Game reporting |
| 323 B | DF | .~.~ Bowling |
| 326 | DF | .~ Plural (e.g., concurrent auxiliary) single indications (e.g., light flashes when bell rings) |
| 327 | DF | .~.~ With sounder signal cut-off |
| 328 | DF | .~ Audible signals (e.g., bell rings softly first and then loudly) |
| 329 | DF | .~.~ Intermittent |
| 330 | DF | .~ In and out indicators (e.g., doorbell button flashes "out" sign) |
| 331 | DF | .~ Periodic or flashing |
| 332 | DF | .~ Signal light systems |
| 333 | DF | .~ With specific power supply (e.g., power substitution) |
| 425.1 | DF | REPEATER IN UNSPECIFIED TYPE COMMUNICATIONS LINE OR CHANNEL (E.G., RELAY STATION) |
| 425.2 | DF | .~ Power control |
| 407.1 | DF | TACTUAL INDICATION |
| 407.2 | DF | .~ With input means (e.g., keyboard) |
| 815.4 | DF | VISUAL INDICATION |
| 815.41 | DF | .~ False signal prevention (anti-sunlight) |
| 815.42 | DF | .~ Having light piping |
| 815.43 | DF | .~.~ With specified colors |
| 815.44 | DF | .~ Seven-segment indicator |
| 815.45 | DF | .~ Using light emitting diodes |
| 815.46 | DF | .~ Audio responsive lamp |
| 815.47 | DF | .~ Switchboard or panel type (e.g., bullseye) |
| 815.48 | DF | .~.~ Pushbutton |
| 815.49 | DF | .~.~ Housing |
| 815.5 | DF | .~.~.~ Including optical means |
| 815.51 | DF | .~.~.~ Including spring |
| 815.52 | DF | .~.~ With details of energizing circuit |
| 815.53 | DF | .~ Lighted alphanumeric or character indicator matrix |
| 815.54 | DF | .~.~ Having optical means in viewing path |
| 815.55 | DF | .~ Transparent or translucent indicator with means for blocking light |
| 815.56 | DF | .~.~ Color |
| 815.57 | DF | .~.~ Having optical device |
| 815.58 | DF | .~ Step by step positioner |
| 815.59 | DF | .~.~ Having resetting device |
| 815.6 | DF | .~.~ Remote controller |
| 815.61 | DF | .~.~ Drum indicator |
| 815.62 | DF | .~ Electromagnetic actuator for indicator matrix |
| 815.63 | DF | .~ Binary indicator |
| 815.64 | DF | .~ Electromagnetic rotator for indicator wheel |
| 815.65 | DF | .~ Multiple colors |
| 815.66 | DF | .~.~ By light signal |
| 815.67 | DF | .~.~.~ Plural |
| 815.68 | DF | .~.~.~ With movable optical means |
| 815.69 | DF | .~ Diverse indications |
| 815.7 | DF | .~.~ Having percussion type indication (e.g., electric bells, chimes) |
| 815.71 | DF | .~.~.~ Electromagnetic |
| 815.72 | DF | .~.~ Having pneumatic type indication |
| 815.73 | DF | .~ With lamp enclosed in transparent housing |
| 815.74 | DF | .~.~ Combined |
| 815.75 | DF | .~.~ Light source modifier |
| 815.76 | DF | .~.~.~ Lens type |
| 815.77 | DF | .~.~ Relatively movable light source |
| 815.78 | DF | .~ Pointer indicator |
| 815.79 | DF | .~.~ Annunciator |
| 815.8 | DF | .~.~.~ Having electromagnetically releasable latch |
| 815.81 | DF | .~ Grouped drop annunciators |
| 815.82 | DF | .~.~ Support |
| 815.83 | DF | .~ Movable |
| 815.84 | DF | .~.~ Semaphore |
| 815.85 | DF | .~.~ Self restoring type annunciator |
| 815.86 | DF | .~.~ Rotary |
| 815.87 | DF | .~.~.~ Rotor driven |
| 815.88 | DF | .~.~.~ Vane indicator |
| 815.89 | DF | .~.~ Circuit closing type |
| 815.9 | DF | .~.~ By electromagnetically releasable latch |
| 815.91 | DF | .~.~.~ Having restoring means |
| 815.92 | DF | .~.~.~ Gravity operated drop annunciator |
| 384.1 | DF | AUDIBLE INDICATION |
| 384.2 | DF | .~ Ultrasonic pest control |
| 384.3 | DF | .~ Simulation |
| 384.4 | DF | .~ Electronic siren (e.g., wail tone or yelp tone warning device) |
| 384.5 | DF | .~ With computer element |
| 384.6 | DF | .~ Piezoelectric |
| 384.7 | DF | .~ Electronic |
| 384.71 | DF | .~.~ Timing |
| 384.72 | DF | .~.~ Plural generators |
| 384.73 | DF | .~.~ With sound transducer details |
| 385.1 | DF | .~ Explosive |
| 387.1 | DF | .~ Weatherproofing |
| 388.1 | DF | .~ Diaphragm (e.g., horn or buzzer) |
| 390.1 | DF | .~.~ Rotary actuator |
| 390.2 | DF | .~.~.~ Having spring |
| 388.2 | DF | .~.~ Alternating current |
| 388.3 | DF | .~.~ With auxiliary flexible membrane |
| 388.4 | DF | .~.~ With resonance chamber |
| 388.5 | DF | .~.~ Armature support |
| 388.6 | DF | .~.~.~ Having spring |
| 388.7 | DF | .~.~ Interrupter |
| 388.8 | DF | .~.~.~ Having spring |
| 391.1 | DF | .~.~ Housing or mounting |
| 392.1 | DF | .~ Percussion-type sound producer (e.g., signal chimes or bells) |
| 392.2 | DF | .~.~ Rotary actuator |
| 393.1 | DF | .~.~ Plural armatures |
| 393.2 | DF | .~.~ Battery operated |
| 393.3 | DF | .~.~ Pushbutton |
| 393.4 | DF | .~.~ Including timer |
| 392.3 | DF | .~.~ Volume control |
| 401.1 | DF | .~.~ Alternating current |
| 398.1 | DF | .~.~ Nonelectrical driving means (e.g., spring or weight) |
| 398.2 | DF | .~.~.~ With electromagnetic control |
| 398.3 | DF | .~.~.~.~ Including circuit breaker |
| 392.4 | DF | .~.~ Tubular sound producer (e.g., signal chimes) |
| 392.5 | DF | .~.~ Resonator (e.g., signal chimes) |
| 395.1 | DF | .~.~ Suspended (e.g., locomotive bell) |
| 397.1 | DF | .~.~ Armature support |
| 397.2 | DF | .~.~.~ Having spring |
| 397.3 | DF | .~.~ Interrupter |
| 397.4 | DF | .~.~.~ Having spring |
| 397.5 | DF | .~.~ Polarized |
| 396.1 | DF | .~.~ Housing or mounting |
| 404.1 | DF | .~ Pneumatic-type sound producer (e.g., whistle or siren) |
| 404.2 | DF | .~.~ Rotary actuator |
| 404.3 | DF | .~.~ With valve |
| 999 | DF | MISCELLANEOUS |
| ********************************* | ||
| FOREIGN ART COLLECTIONS | ||
| ********************************* | ||
| * | DD | CONDITION RESPONSIVE INDICATING SYSTEM (340/500) |
| * | DD | .~ Specific condition (340/540) |
| * | DD | .~.~ Intrusion detection (340/541) |
| FOR 100 | DF | .~.~.~ Door or window movement (340/545) |
| * | DD | CONDITION RESPONSIVE INDICATING SYSTEM (340/500) |
| * | DD | .~ Specific condition (340/540) |
| FOR 101 | DF | .~.~ Article placement or removal (340/568) |
| FOR 102 | DF | .~.~.~ Detectable device on protected article (340/572) |
| * | DD | CONDITION RESPONSIVE INDICATING SYSTEM (340/500) |
| * | DD | .~ Specific condition (340/540) |
| FOR 103 | DF | .~.~ Human or animal (340/573) |
| * | DD | CONDITION RESPONSIVE INDICATING SYSTEM (340/500) |
| * | DD | .~ Specific condition (340/540) |
| FOR 104 | DF | .~.~ Position responsive (340/686) |
| * | DD | CONDITION RESPONSIVE INDICATING SYSTEM (340/500) |
| FOR 105 | DF | .~ Specified indicator structure (340/691) |
| * | DD | CONDITION RESPONSIVE INDICATING SYSTEM (340/500) |
| FOR 106 | DF | .~ Specified power supply or housing (340/693) |
| FOR 107 | DD | .~ Loop (340/825.05) |