 Electronic File Wrappers |  Electronic Patent Documents |  Paper Patent Documents | Current as of: June, 1999
|  and Services |
| DF | CLASS NOTES | |
| 1 | DF | BINAURAL AND STEREOPHONIC |
| 2 | DF | .~ Broadcast or multiplex stereo |
| 3 | DF | .~.~ FM final modulation |
| 4 | DF | .~.~.~ AM subcarrier |
| 5 | DF | .~.~.~.~ Four discrete channels |
| 6 | DF | .~.~.~.~.~ Having transmitter |
| 7 | DF | .~.~.~.~ Switch-type detector or modulator |
| 8 | DF | .~.~.~.~.~ Two diodes |
| 9 | DF | .~.~.~.~.~ Four or more diodes |
| 10 | DF | .~.~.~.~ Channel separation control |
| 11 | DF | .~.~.~.~ Automatic switchover between mono and stereo modes |
| 12 | DF | .~.~.~.~ Stereo indicators (e.g., stereo presence) |
| 13 | DF | .~.~.~.~ Antinoise |
| 14 | DF | .~.~.~.~ Having transmitter |
| 15 | DF | .~.~ AM or both AM and angle final modulation |
| 16 | DF | .~.~.~ Having transmitter |
| 17 | DF | .~ Pseudo stereophonic |
| 18 | DF | .~.~ Pseudo quadrasonic |
| 19 | DF | .~ Quadrasonic |
| 20 | DF | .~.~ Matrix |
| 21 | DF | .~.~.~ 4-2-4 |
| 22 | DF | .~.~.~.~ Variable decoder |
| 23 | DF | .~.~.~.~ With encoder |
| 23.1 | DF | .~ Hearing aid |
| 300 | DF | .~ Stereo speaker arrangement |
| 301 | DF | .~.~ In furniture or clothing |
| 302 | DF | .~.~ In vehicle |
| 303 | DF | .~.~ Optimization |
| 304 | DF | .~.~.~ Enclosure orientation |
| 305 | DF | .~.~.~ Enclosure adaptation |
| 306 | DF | .~.~ With image presentation means |
| 307 | DF | .~.~ Surround (i.e., front plus rear or side) |
| 308 | DF | .~.~ In single baffle |
| 309 | DF | .~.~ Stereo earphone |
| 310 | DF | .~.~.~ Virtual positioning |
| 311 | DF | .~.~.~ Wireless or for use in diverse |
| 26 | DF | .~ Stereo sound pickup device (microphone) |
| 27 | DF | .~ Center channel |
| 28 | DF | .~ Amplifier |
| 54 | DF | HELIUM SPEECH |
| 55 | DF | AUDIO TRANSDUCER PROTECTION CIRCUITRY |
| 56 | DF | MONITORING OF SOUND |
| 57 | DF | .~ Amplification control responsive to ambient sound |
| 58 | DF | MONITORING/MEASURING OF AUDIO DEVICES |
| 59 | DF | .~ Loudspeaker operation |
| 60 | DF | .~ Testing of hearing aids |
| 61 | DF | SOUND EFFECTS |
| 62 | DF | .~ Tremelo or vibrato effects |
| 63 | DF | .~ Reverberators |
| 64 | DF | .~.~ Mechanical (e.g., reverberation chamber) |
| 65 | DF | .~.~.~ Helical spring |
| 66 | DF | DEREVERBERATORS |
| 67 | DF | STETHOSCOPES, ELECTRICAL |
| 312 | DF | HEARING AIDS, ELECTRICAL |
| 313 | DF | .~ Directional |
| 314 | DF | .~ Programming interface circuitry |
| 315 | DF | .~ Remote control, wireless, or alarm |
| 316 | DF | .~ Frequency transposition |
| 317 | DF | .~ Noise compensation circuit |
| 318 | DF | .~.~ Feedback suppression |
| 319 | DF | .~ With vacuum tube amplifier |
| 320 | DF | .~ Spectral control |
| 321 | DF | .~ Wideband gain control |
| 322 | DF | .~ Specified casing or housing |
| 323 | DF | .~.~ Power supply or programming interface terminals |
| 324 | DF | .~.~ Component mounting |
| 325 | DF | .~.~ Cerumen protection |
| 326 | DF | .~.~ Non-air-conducted sound delivery |
| 327 | DF | .~.~ Spectacle |
| 328 | DF | .~.~ Ear insert |
| 329 | DF | .~.~.~ Device for manipulation |
| 330 | DF | .~.~ Hook over ear |
| 331 | DF | .~.~ Inductive pickup |
| 70 | DF | ARTIFICIAL LARYNX, ELECTRICAL |
| 71.1 | DF | ACOUSTICAL NOISE OR SOUND CANCELLATION |
| 71.2 | DF | .~ Acoustic, nonairborne vibration sensing or counterwave emission |
| 71.3 | DF | .~ From appliance |
| 71.4 | DF | .~ Within cabin or compartment of vehicle |
| 71.5 | DF | .~ Within duct |
| 71.6 | DF | .~ Adjacent ear |
| 71.7 | DF | .~ Particular transducer or enclosure structure |
| 71.8 | DF | .~ Counterwave generation control path |
| 71.9 | DF | .~.~ Nonacoustically derived reference signal |
| 71.11 | DF | .~.~ Adaptive filter topology |
| 71.12 | DF | .~.~ Algorithm or formula (e.g., LMS, Filtered-X, etc.) |
| 71.13 | DF | .~.~ Analog or nonadaptive |
| 71.14 | DF | .~.~ Tonal noise or particular frequency or band |
| 72 | DF | HEARING PROTECTORS, ELECTRICAL |
| 73.1 | DF | SOUND OR NOISE MASKING |
| 74 | DF | HEADPHONE CIRCUITS |
| 75 | DF | MEGAPHONES |
| 76 | DF | LECTERNS |
| 77 | DF | ONE-WAY AUDIO SIGNAL PROGRAM DISTRIBUTION |
| 78 | DF | .~ Drive-in |
| 79 | DF | .~ Near field |
| 80 | DF | .~ Multiple channel |
| 81 | DF | .~.~ With switching |
| 82 | DF | .~ Public address system |
| 83 | DF | .~.~ Feedback suppression |
| 84 | DF | .~.~ Spare amplifier substitution |
| 85 | DF | .~.~ Speaker or channel switching |
| 86 | DF | VEHICLE |
| 87 | DF | HAVING NON-ELECTRICAL FEATURE (E.G., MOUNTING) |
| 89 | DF | .~.~ Loudspeakers driven in given phase relationship |
| 332 | DF | .~ And loudspeaker |
| 333 | DF | .~.~ With furniture, clothing, or image presentation means |
| 334 | DF | .~.~ Portable or for use in diverse environment |
| 335 | DF | .~.~ Plural diaphragms, compartments, or housings |
| 336 | DF | .~.~ Curved or angled housing |
| 91 | DF | .~ Having microphone |
| 92 | DF | DIRECTIVE CIRCUITS FOR MICROPHONES |
| 93 | DF | FEEDBACK SUPPRESSION |
| 94.1 | DF | NOISE OR DISTORTION SUPPRESSION |
| 94.2 | DF | .~ Spectral adjustment |
| 94.3 | DF | .~.~ In multiple frequency bands |
| 94.4 | DF | .~ Interpolation |
| 94.5 | DF | .~ Soft switching, muting, or noise gating |
| 94.6 | DF | .~ Hum or ground loop |
| 94.7 | DF | .~ Using signal channel and noise channel |
| 94.8 | DF | .~ Peak limiting or pulsive noise compensation |
| 94.9 | DF | .~ Feedforward circuitry for transducer compensation |
| 95 | DF | MICROPHONE FEEDBACK |
| 96 | DF | LOUDSPEAKER FEEDBACK |
| 97 | DF | INCLUDING PHASE CONTROL |
| 98 | DF | INCLUDING FREQUENCY CONTROL |
| 99 | DF | .~ Having crossover filter |
| 100 | DF | .~.~ With active device |
| 101 | DF | .~ Automatic tone control |
| 102 | DF | .~.~ With amplitude control |
| 103 | DF | .~ Having automatic equalizer circuit |
| 104 | DF | INCLUDING AMPLITUDE OR VOLUME CONTROL |
| 105 | DF | .~ Remote |
| 106 | DF | .~ With amplitude compression/expansion |
| 107 | DF | .~ Automatic |
| 108 | DF | .~.~ Including feedback |
| 109 | DF | .~ With manual volume control |
| 110 | DF | VOICE CONTROLLED |
| 111 | DF | CIRCUITRY COMBINED WITH SPECIFIC TYPE MICROPHONE OR LOUDSPEAKER |
| 112 | DF | .~ With carbon microphone |
| 113 | DF | .~ With electrostatic microphone |
| 114 | DF | .~ With piezoelectric microphone |
| 115 | DF | .~ With magnetic microphone |
| 116 | DF | .~ With electrostatic loudspeaker |
| 117 | DF | .~ With magnetic loudspeaker |
| 118 | DF | WITH MUSICAL INSTRUMENT |
| 119 | DF | WITH MIXER |
| 120 | DF | WITH AMPLIFIER |
| 121 | DF | .~ Feedback |
| 122 | DF | HAVING MICROPHONE |
| 123 | DF | SWITCHING |
| 150 | DF | ELECTRO-ACOUSTIC AUDIO TRANSDUCER |
| 151 | DF | .~ Body contact wave transfer (e.g., bone conduction earphone, larynx microphone) |
| 152 | DF | .~ Driven diverse static structure (e.g., wall, sounding board) |
| 337 | DF | .~ Having acoustic wave modifying structure |
| 338 | DF | .~.~ With tubular waveguide or resonant element |
| 339 | DF | .~.~ Sound intensifying or spreading element |
| 340 | DF | .~.~.~ Horn |
| 341 | DF | .~.~.~.~ Inverted, folded, or curled |
| 342 | DF | .~.~.~.~ Plural horns or diaphragms |
| 343 | DF | .~.~.~.~ Phase plug |
| 344 | DF | .~.~.~ Mouthpiece |
| 345 | DF | .~.~ Acoustic enclosure |
| 346 | DF | .~.~.~ Acoustic resistance |
| 347 | DF | .~.~.~.~ On front side of diaphragm |
| 348 | DF | .~.~.~.~ On rear side of diaphragm |
| 349 | DF | .~.~.~ Bass reflex (e.g., rear wave) |
| 350 | DF | .~.~.~ Front wave |
| 351 | DF | .~.~.~ Plural chambers |
| 352 | DF | .~.~.~ Having internal wave reflecting means |
| 353 | DF | .~.~.~ Acoustic damping or attenuating resonator |
| 354 | DF | .~.~ Absorbing or attenuating element |
| 160 | DF | .~.~ Reflecting element |
| 161 | DF | .~ With mechanical amplifier arrangement |
| 162 | DF | .~ Detail of mechanical vibration coupling to transducer (e.g., tuned vibrating element) |
| 163 | DF | .~ Having bi-directional transducer |
| 164 | DF | .~ Thermal response to, or generation of, sound vibration |
| 165 | DF | .~ By modifying fluid flow |
| 166 | DF | .~ Having a fluid as a conducting element |
| 167 | DF | .~.~ Ionized gap, spark, or flame |
| 355 | DF | .~ Housed microphone |
| 356 | DF | .~.~ Directional |
| 357 | DF | .~.~.~ With plural sound ports (e.g., pressure gradient) |
| 358 | DF | .~.~.~.~ Plural or variable characteristics |
| 359 | DF | .~.~ Windscreen |
| 360 | DF | .~.~ Cavity |
| 361 | DF | .~.~ Mounting or support |
| 362 | DF | .~.~.~ Boom (other than on headset) |
| 363 | DF | .~.~.~ Stand or gooseneck |
| 364 | DF | .~.~.~ On body or clothing |
| 365 | DF | .~.~.~ In electronic apparatus or vehicle |
| 366 | DF | .~.~.~ Detachable from support |
| 367 | DF | .~.~.~ In headgear |
| 368 | DF | .~.~.~ On shock absorbing support |
| 369 | DF | .~ Microphone capsule only |
| 170 | DF | .~.~ Compound |
| 171 | DF | .~.~ Micromagnetic |
| 172 | DF | .~.~ Light modifying |
| 173 | DF | .~.~ Piezoelectric or ferroelectric |
| 174 | DF | .~.~ Capacitive |
| 175 | DF | .~.~ Semiconductor junction microphone |
| 176 | DF | .~.~ Conductive diaphragm (e.g., reed, ribbon) |
| 177 | DF | .~.~ Dynamic (e.g., magnetic) |
| 178 | DF | .~.~ Vibrating electrical contract |
| 179 | DF | .~.~ Resistive |
| 180 | DF | .~.~.~ Granular or carbon |
| 181 | DF | .~.~.~.~ Differential |
| 182 | DF | .~ Plural or compound reproducers |
| 370 | DF | .~.~ Headphone |
| 371 | DF | .~.~.~ Particular cup |
| 372 | DF | .~.~.~.~ Having mechanical or acoustic sound attenuation |
| 373 | DF | .~.~.~.~ Openable to ambient |
| 374 | DF | .~.~.~ Particular support structure |
| 375 | DF | .~.~.~.~ And microphone |
| 376 | DF | .~.~.~.~ Headgear |
| 377 | DF | .~.~.~.~ Plural bands |
| 378 | DF | .~.~.~.~ Single band |
| 379 | DF | .~.~.~.~ adjustable |
| 380 | DF | .~.~.~.~ Ear insert or bone conduction |
| 381 | DF | .~.~.~.~ Hook over ear or spectacle |
| 382 | DF | .~.~.~.~ Sound conducting tube |
| 383 | DF | .~.~.~.~ Collapsible |
| 384 | DF | .~.~.~ Electrical hardware feature |
| 184 | DF | .~.~ Different types of diaphragms |
| 185 | DF | .~.~ Having common voice coil |
| 186 | DF | .~.~ Plural diaphragms |
| 385 | DF | .~ Having body supported structure other than on head |
| 386 | DF | .~ Mounting or support feature of housed loudspeaker |
| 387 | DF | .~.~ Directional, directible, or movable |
| 388 | DF | .~.~ With furniture, clothing, or image display |
| 389 | DF | .~.~ In vehicle |
| 390 | DF | .~.~ Boom or support arm |
| 391 | DF | .~.~ Grille |
| 392 | DF | .~.~ Resilient |
| 393 | DF | .~.~ electrical insulation feature |
| 394 | DF | .~.~ Electrical hardware |
| 395 | DF | .~.~ Mechanical detail |
| 189 | DF | .~ Having protective or sheilding feature |
| 190 | DF | .~ Electrostrictive, magnetostrictive, or piezoelectric |
| 191 | DF | .~ Having electrostatic element (e.g., electret, vibrating plate) |
| 396 | DF | .~ Electromagnetic (e.g., dyynamic) |
| 397 | DF | .~.~ Cooling feature |
| 398 | DF | .~.~ Having diaphragm support feature |
| 399 | DF | .~.~ Conductive diaphragm (e.g., ribbon) |
| 400 | DF | .~.~ Movable voice coil |
| 401 | DF | .~.~.~ Multiple voice coils |
| 402 | DF | .~.~.~.~ For different frequencies |
| 403 | DF | .~.~.~ Centering from outside bobbin or diaphragm |
| 404 | DF | .~.~.~.~ Spider |
| 405 | DF | .~.~.~ Centering from within bobbin or diaphragm |
| 406 | DF | .~.~.~ Field coil |
| 407 | DF | .~.~.~ Particular bobbin structure |
| 408 | DF | .~.~.~ Pattern |
| 409 | DF | .~.~.~ Wiring structure |
| 410 | DF | .~.~.~ Coil coating, winding layer structure, or wire |
| 411 | DF | .~.~ Including adjustment mechanism |
| 412 | DF | .~.~ Magnetic circuit |
| 413 | DF | .~.~.~ Having damping |
| 414 | DF | .~.~.~ Flux modifying means |
| 415 | DF | .~.~.~ Magnetic liquid |
| 416 | DF | .~.~.~ Inverted (e.g., within cone) |
| 417 | DF | .~.~.~ Armature diaphragm |
| 418 | DF | .~.~.~ Armature linked to diaphragm |
| 419 | DF | .~.~.~ Not having central magnetic portion |
| 420 | DF | .~.~.~ Having central magnetic portion |
| 421 | DF | .~.~.~.~ Plural magnets |
| 422 | DF | .~.~.~.~.~ Like poles adjacent |
| 423 | DF | .~.~ Specified diaphragm shape or structure |
| 424 | DF | .~.~.~ Plural portions or sections |
| 425 | DF | .~.~.~.~ Honeycomb |
| 426 | DF | .~.~.~ Critically defined material or lamination |
| 427 | DF | .~.~.~.~ Metal |
| 428 | DF | .~.~.~.~ Fibrous |
| 429 | DF | .~.~.~ Apertures in surface |
| 430 | DF | .~.~.~ Dome or round |
| 431 | DF | .~.~.~ Flat |
| 432 | DF | .~.~.~ Conical |
| 433 | DF | .~.~ Basket detail |
| 124 | DF | MISCELLANEOUS |
| ****************************** | ||
| FOREIGN ART COLLECTIONS | ||
| ****************************** | ||
| FOR 100 | DF | AUDIO BANDWIDTH COMPRESSION OR EXPANSION (381/29) |
| FOR 101 | DF | .~ With content reduction encoding (381/30) |
| FOR 102 | DF | .~ Delay line (381/33) |
| FOR 103 | DF | TIME COMPRESSION OR EXPANSION (E.G., RUN LENGTH CODING) (381/34) |
| FOR 104 | DF | .~ With content reduction encoding (381/35) |
| FOR 105 | DF | SPEECH ANALYSIS AND SYNTHESIS COMBINED (381/36) |
| FOR 106 | DF | .~ Using frequency (381/37) |
| FOR 107 | DF | .~.~ Pitch (381/38) |
| FOR 108 | DF | .~.~ Formants (381/39) |
| FOR 109 | DF | .~ Using time (381/40) |
| FOR 110 | DF | SPEECH ANALYSIS (E.G., PHONEME RECOGNITION) (381/41) |
| FOR 111 | DF | .~ Voice recognition (381/42) |
| FOR 112 | DF | .~ Word recognition (381/43) |
| FOR 113 | DF | .~.~ Phonetic typewriters (381/44) |
| FOR 114 | DF | .~.~ Frequency domain (381/45) |
| FOR 115 | DF | .~ Detection of speech in noise (381/46) |
| FOR 116 | DF | .~ Signal to noise ratio enhancement (381/47) |
| FOR 117 | DF | .~ Speech parameter display (381/48) |
| FOR 118 | DF | .~ Speech pitch fundamental frequency (381/49) |
| FOR 119 | DF | .~ Speech formant frequencies (381/50) |
| FOR 120 | DF | SPEECH SYNTHESIS (381/51) |
| FOR 121 | DF | .~ Speech from printed matter (381/52) |
| FOR 122 | DF | .~ Vocal tract model (381/53) |
| FOR 123 | DF | ACOUSTICAL NOISE OR SOUND CANCELLATION (381/71) |
| FOR 124 | DF | NOISE SUPPRESSION (381/94) |
| * | DD | BINAURAL AND STEREOPHONIC |
| FOR 125 | DF | .~ Speaker arrangement (381/24) |
| FOR 126 | DF | .~.~ Earphone (381/25) |
| FOR 127 | DF | HEARING AIDS, ELECTRICAL (381/68) |
| FOR 128 | DF | .~ Directional (381/68.1) |
| FOR 129 | DF | .~ Frequency control (381/68.2) |
| FOR 130 | DF | .~ Bone conduction (381/68.3) |
| FOR 131 | DF | .~ Gain Control (381/68.3) |
| FOR 132 | DF | .~ Spectacle (381/68.5) |
| FOR 133 | DF | .~ Ear insert (381/68.6) |
| FOR 134 | DF | .~ Hook over ear (381/68.7) |
| FOR 135 | DF | .~ Specified casing or housing (381/69) |
| FOR 136 | DF | .~.~ Having vacuum tube amplifier (381/69.1) |
| FOR 137 | DF | .~.~ Having battery (381/69.2) |
| FOR 138 | DF | .~ Having enclosure or housing (381/138) |
| FOR 139 | DF | .~.~ With loudspeaker (e.g., baffle, spatial orientation, etc.) (381/90) |
| FOR 140 | DD | .~ With acoustic wave modifying structure (381/153) |
| FOR 141 | DD | .~.~ Including sound conducting tube (381/154) |
| FOR 142 | DD | .~.~ Directional (381/155) |
| FOR 143 | DD | .~.~ Sound intensifying or spreading element (381/156) |
| FOR 144 | DD | .~.~.~ Mouthpiece (381/157) |
| FOR 145 | DD | .~.~ Absorbing or attenuating element (e.g., baffle, obstruction, damping) (381/158) |
| FOR 146 | DD | .~.~ Enclosure or resonant cavity (381/159) |
| FOR 147 | DD | .~ Microphone (381/168) |
| FOR 148 | DD | .~.~ With mounting or support feature (381/169) |
| FOR 149 | DD | .~.~ Headphone (381/183) |
| FOR 150 | DD | .~ Having body supported structure (e.g., earphone) (381/187) |
| FOR 151 | DD | .~ With mounting or support feature (381/188) |
| FOR 152 | DD | .~ Electromagnetic (e.g., dynamic) (381/192) |
| FOR 153 | DD | .~.~ Having feature of edge-supported diaphragm (381/193) |
| FOR 154 | DD | .~.~ Movable voice coil (381/194) |
| FOR 155 | DD | .~.~.~ Multiple (e.g., double) (381/195) |
| FOR 156 | DD | .~.~.~ Pattern (381/196) |
| FOR 157 | DD | .~.~.~ Centering (381/197) |
| FOR 158 | DD | .~.~ Including adjustment mechanism (381/198) |
| FOR 159 | DD | .~.~ Magnetic circuit or core structure (381/199) |
| FOR 160 | DD | .~.~.~ Armature (381/200) |
| FOR 161 | DD | .~.~.~ Magnetic configuration (e.g., tubular or U-shaped) (381/201) |
| FOR 162 | DD | .~.~ Specified diaphragm shape or structure (381/202) |
| FOR 163 | DD | .~.~.~ Flat (381/203) |
| FOR 164 | DD | .~.~.~ Conical (381/204) |
| FOR 165 | DD | .~ Electro-acoustical transducer mounting or support (381/205) |