US Patent Class 342
COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION)



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Current as of: June, 1999
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  DF  CLASS NOTES
1  DF  RADIO WAVE ABSORBER
2  DF  .~ For aircraft or missile
3  DF  .~ For camouflage
4  DF  .~ With particular geometric configuration
5  DF  RADAR REFLECTOR
6  DF  .~ With modulation
7  DF  .~ Corner
8  DF  .~.~ Inflatable or collapsable
9  DF  .~.~ Decoy or tow target
10  DF  .~ Inflatable or collapsable
11  DF  .~ With spherical lens (e.g., Luneberg lens)
12  DF  .~ Chaff
13  DF  RADAR EW (ELECTRONIC WARFARE)
14  DF  .~ ECM (Electronic countermeasures, i.e., jamming)
15  DF  .~.~ With repeater
16  DF  .~ ECCM (Electronic counter-countermeasures, i.e., antijamming)
17  DF  .~.~ Radar reacts to jamming
18  DF  .~.~.~ By changing frequency
19  DF  .~.~.~ By varying gain or blocking receiver
20  DF  .~ Detection of surveilance
21  DF  BASE BAND SYSTEM
22  DF  TRANSMISSION THROUGH MEDIA OTHER THAN AIR OR FREE SPACE
23  DF  BERTHING OR DOCKING
24  DF  BLIND AID
25  DF  SYNTHETIC APERTURE RADAR
26  DF  WEATHER RADAR
27  DF  PRESENCE DETECTION ONLY
28  DF  .~ By motion detection
29  DF  AIRCRAFT COLLISION AVOIDANCE SYSTEM (CAS)
30  DF  .~ With transponder
31  DF  .~.~ Including synchronized clock
32  DF  .~.~ Included in Secondary Surveilance Radar (SSR) or Air Traffic Control Radio Beacon System (ATCRBS)
33  DF  AIRCRAFT LANDING SYSTEM
34  DF  .~ Ground control approach (GCA)
35  DF  .~ Microwave landing system (MLS)
36  DF  AIR TRAFFIC CONTROL
37  DF  .~ Secondary Surveilance Radar (SSR) or Air Traffic Control Radar Beacon System (ATCRBS)
38  DF  .~.~ With altitude information
39  DF  .~.~ With side lobe suppression
40  DF  .~.~ With defruiting or degarbling
41  DF  SHIP COLLISION AVOIDANCE
42  DF  RADAR TRANSPONDER SYSTEM
43  DF  .~ Combined with primary radar system
44  DF  .~ Unique identity
45  DF  .~ IFF or SIF
46  DF  .~ Navigational
47  DF  .~.~ Distance measuring equipment (DME)
48  DF  .~.~.~ With automatic lock-on
49  DF  .~.~.~ With VOR/TACAN
50  DF  .~ With Telemetry
51  DF  .~ Transponder only
52  DF  COMBINED WITH DIVERSE TYPE RADIANT ENERGY SYSTEM
53  DF  .~ With infrared device
54  DF  .~ With laser
55  DF  .~ With television
56  DF  .~ With direction finding
57  DF  .~ With radio voice communication
58  DF  .~ With transmission to a remote station
59  DF  PLURAL RADAR
60  DF  TRANSMITTING INTELLIGENCE
61  DF  RETURN SIGNAL CONTROLS EXTERNAL DEVICE
62  DF  .~ Missile or spacecraft guidance
63  DF  .~ Aircraft guidance
64  DF  .~.~ With map matching
65  DF  .~.~ With terrain avoidance or alarm
66  DF  .~ Camera
67  DF  .~ Gun (e.g., fire control)
68  DF  .~ Proximity fuze
69  DF  .~ Device actuated by presence of land vehicle
70  DF  .~ Radar mounted on and controls land vehicle
71  DF  .~.~ With control of brakes or steering
72  DF  .~.~ With control of safety device (e.g., air bags)
73  DF  RETURN SIGNAL CONTROLS RADAR SYSTEM
74  DF  .~ Antenna control
75  DF  .~.~ Physical orientation
76  DF  .~.~.~ With ground tracking
77  DF  .~.~.~ With signal error correction
78  DF  .~.~.~ Conical scan
79  DF  .~.~.~ Lobe switching
80  DF  .~.~.~ Monopulse
81  DF  .~.~ Beam direction by phase or frequency control
82  DF  .~ Transmitter
83  DF  .~.~ Signal phase or frequency other than pulse repetition frequency (PRF)
84  DF  .~.~.~ Function of doppler frequency
85  DF  .~.~.~ Function of distance
86  DF  .~.~.~.~ With constant phase
87  DF  .~.~.~.~ With constant beat frequency
88  DF  .~.~ Transmission timing (e.g., ring around)
89  DF  .~ Receiver
90  DF  .~.~ Automatic target detection
91  DF  .~.~ Gain or threshold
92  DF  .~.~.~ Automatic gain control (AGC)
93  DF  .~.~.~ Constant false alarm rate (CFAR)
94  DF  .~.~ Gating
95  DF  .~.~.~ Automatic range tracking
96  DF  .~.~.~.~ Automatic track while scan (ATWS)
97  DF  .~.~.~.~ With automatic lock-on
98  DF  .~.~ Frequency
99  DF  .~.~.~ Doppler frequency tracking
100  DF  .~.~.~.~ Wtih local osillator control
101  DF  .~.~.~.~ With filter control
102  DF  .~.~.~ Phase
103  DF  .~.~.~.~ Phase locked loop
104  DF  DETERMINING VELOCITY
105  DF  .~ Other than doppler (e.g., range rate)
106  DF  .~ Combined with determining acceleration
107  DF  .~ Combined with determining distance and direction
108  DF  .~.~ With correlation
109  DF  .~ Combined with determining distance
110  DF  .~.~ With plural fixed range gates
111  DF  .~.~ With plural receiver frequency band separation
112  DF  .~.~ With plural frequencies transmission
113  DF  .~ Combined with determining direction (i.e., bearing)
114  DF  .~ Combined with determining sense of motion (i.e., approaching or receding)
115  DF  .~ Digital
116  DF  .~ With plural received frequency band separation
117  DF  .~ With plural beams (e.g., "Janus")
118  DF  DETERMINING DISTANCE
119  DF  .~ Miss distance indicator (MDI)
120  DF  .~ Altimeter
121  DF  .~.~ With additional indicator
122  DF  .~.~ FM type
123  DF  .~ Height finder
124  DF  .~ Material level within container
125  DF  .~ With remote cooperating station
126  DF  .~ Triangulation
127  DF  .~ Phase comparison
128  DF  .~ With frequency modulation
129  DF  .~.~ Plural frequencies transmitted
130  DF  .~.~ Plural modulation
131  DF  .~.~.~ Combined with pulse modulation (e.g., frequency agile)
132  DF  .~.~.~.~ With pulse modulation (e.g., "Chirp")
133  DF  .~.~ Combined with determining direction
134  DF  .~ With pulse modulation
135  DF  .~.~ Digital (e.g., with counter)
136  DF  .~.~.~ With plural fixed range gates
137  DF  .~.~ With variable pulse repetition frequency (PRF) or pulse width
138  DF  .~.~ With type "A" or "J" range scope
139  DF  .~.~ Combined with determining direction
140  DF  .~.~.~ With azimuth and elevation determination
141  DF  .~.~.~ Off boresight
142  DF  .~.~.~ With CRT display
143  DF  .~.~.~.~ Plural
144  DF  .~.~.~.~ PPI type
145  DF  .~ With correlation
146  DF  .~ Combined with determining direction
147  DF  DETERMINING DIRECTION
148  DF  .~ Low angle processing
149  DF  .~ Monopulse
150  DF  .~.~ With common IF channel
151  DF  .~.~ With channel equalization
152  DF  .~.~ With quadrature difference processing
153  DF  .~.~ With particular antenna or waveguide
154  DF  .~.~ Combined with beam steering
155  DF  .~ Lobe switching
156  DF  .~ Interferometer
157  DF  .~ With frequency or phase steering
158  DF  .~ Scanning
159  DF  CLUTTER ELIMINATION
160  DF  .~ MTI (Moving target indicator)
161  DF  .~.~ With vehicle movement compensation (e.g., AMTI (Airborn MTI))
162  DF  .~.~ Digital
163  DF  .~.~ With blind speed elimination
164  DF  .~.~ With storage tube
165  DF  TESTING OR CALIBRATING OF RADAR SYSTEM
166  DF  .~ Proximity fuze
167  DF  .~ With laser
168  DF  .~ With noise generation
169  DF  .~ By simulation
170  DF  .~.~ Microwave
171  DF  .~.~ Doppler
172  DF  .~.~ With delay
173  DF  .~ By monitoring
174  DF  .~.~ Calibrating
175  DF  WITH PARTICULAR CIRCUIT
176  DF  .~ Display
177  DF  .~.~ Plural
178  DF  .~.~ Projection type
179  DF  .~.~ Image production
180  DF  .~.~ Stereoscopic or tridimensional
181  DF  .~.~ Color
182  DF  .~.~ Electronic marker generation
183  DF  .~.~.~ Cursor
184  DF  .~.~ With stabilization (e.g., True Motion, True North)
185  DF  .~.~ Scan conversion
186  DF  .~.~ With sweep expansion
187  DF  .~ Augmenter
188  DF  .~ With polarization
189  DF  .~ For correlation
190  DF  .~ With recording
191  DF  .~.~ Mapping
192  DF  .~ Spectrum analysis
193  DF  .~.~ Harmonic
194  DF  .~ Complex signal (in phase and quadrature)
195  DF  .~ Digital processing
196  DF  .~.~ Fast fourier transform (FFT)
197  DF  .~.~ With video quantizer
198  DF  .~ For receiver protection
199  DF  .~ Automatic frequency control (AFC)
200  DF  .~ For frequency modulation
201  DF  .~.~ Combined with pulse modulation
202  DF  .~ For pulse modulation
203  DF  .~.~ With noise reduction
204  DF  .~.~ With pulse shaping
205  DF  .~ Sensitivity time control (STC)
350  DF  DIRECTIVE
351  DF  .~ Including a radiometer
352  DF  .~ Including a satellite
353  DF  .~.~ Having a signal repeater
354  DF  .~.~ With beam steering
355  DF  .~.~ With control of satellite altitude
356  DF  .~.~ Synchronous satellite
357.01  DF  .~.~ With position indicating
357.02  DF  .~.~.~ With accuracy enhancing
357.03  DF  .~.~.~.~ Using differential correction
357.04  DF  .~.~.~.~ With ambiguity resolving
357.05  DF  .~.~.~ Using Doppler frequency shift
357.06  DF  .~.~.~ Using Global Positioning Satellite (GPS or Glonass)
357.07  DF  .~.~.~.~ Tracking or monitoring (i.e., lost or stolen vehicles)
357.08  DF  .~.~.~.~ Determining relative position (e.g., distance or direction)
357.09  DF  .~.~.~.~ With transmission of location-indicative information to or from a remote station
357.1  DF  .~.~.~.~ Combined with telecommunication
357.11  DF  .~.~.~.~ Attitude determination
357.12  DF  .~.~.~.~ GPS receiver signal processing
357.13  DF  .~.~.~.~ With storage device (i.e., map or database)
357.14  DF  .~.~.~.~ Combined with secondary navigation system (i.e., LORAN, gyroscope, inertial, dead reckoning, etc.)
357.15  DF  .~.~.~.~ Satellite selection (i.e., tracking or acquisition)
357.16  DF  .~.~.~ Using low Earth orbit (telecommunication) satellites
357.17  DF  .~.~.~ With particular action taken responsive to position (i.e., excavating, farming, and surveying)
358  DF  .~.~ With satellite signal correction
359  DF  .~ Including antenna orientation
360  DF  .~ Including antenna pattern plotting
361  DF  .~ Including polarized signal communication transmitter or receiver
362  DF  .~.~ Receiver only
363  DF  .~.~.~ Circular
364  DF  .~.~.~ Eliptical
365  DF  .~.~ Circular
366  DF  .~.~ Eliptical
367  DF  .~ Including directive communication system
368  DF  .~ Including a steerable array
369  DF  .~.~ Injection radiation type
370  DF  .~.~ Retrodirective
371  DF  .~.~ With electronic scanning
372  DF  .~.~.~ Controlled
373  DF  .~.~ With a matrix
374  DF  .~.~ With a switch
375  DF  .~.~ With a delay line (e.g., serpentine transmission line, frequency scanning)
376  DF  .~.~ Including a remote energy source
377  DF  .~.~ Including a computer
378  DF  .~ Utilizing correlation techniques
379  DF  .~.~ Side lobe elimination
380  DF  .~.~.~ Sum of each antenna channel signal
381  DF  .~.~.~ Difference of each antenna channel signal
382  DF  .~.~.~ Mixing each antenna channel signal
383  DF  .~.~ Sum of each antenna signal
384  DF  .~.~ Difference of each antenna channel signal
385  DF  .~ Beacon or receiver
386  DF  .~.~ With transmisson of bearing or position determinative signals
387  DF  .~.~.~ Iso-chronic type
388  DF  .~.~.~.~ Loran
389  DF  .~.~.~.~.~ Loran-C
390  DF  .~.~.~.~.~.~ With cycle selection
391  DF  .~.~.~.~.~ Loran-A
392  DF  .~.~.~.~ With automatic gain control
393  DF  .~.~.~ Iso-frequency type
394  DF  .~.~.~ Iso-phase type
395  DF  .~.~.~.~ With hetrodyne synchronization
396  DF  .~.~.~.~ Omega
397  DF  .~.~.~.~ Decca
398  DF  .~.~.~ Rotating beacon signal
399  DF  .~.~.~ Tacan
400  DF  .~.~.~.~ Receiver only
401  DF  .~.~.~.~.~ VOR
402  DF  .~.~.~.~.~.~ Doppler
403  DF  .~.~.~.~.~.~.~ With circular array of antennas
404  DF  .~.~.~.~ VOR
405  DF  .~.~.~.~.~ Doppler
406  DF  .~.~.~.~.~.~ With circular array of antennas
407  DF  .~.~.~ Fixed course or bearing indicating
408  DF  .~.~.~.~ Moving beam
409  DF  .~.~.~.~ With superimposed images
410  DF  .~.~.~.~ Glide slope transmitter or receiver
411  DF  .~.~.~.~.~ Receiver only
412  DF  .~.~.~.~.~ Transmitter oly
413  DF  .~.~.~.~ Localizer transmitter or receiver
414  DF  .~.~.~.~ Distinctive frequencies equi-signal type
415  DF  .~.~.~.~.~ Coded equi-signal (e.g., A and N type)
416  DF  .~.~.~.~.~ Sequentially effective reflectors
417  DF  .~.~ Direction-finding receiver only
418  DF  .~.~.~ Doppler
419  DF  .~.~.~ Portable
420  DF  .~.~.~ With error or deviatioan compensator or eliminator
421  DF  .~.~.~.~ Pulse-type noise elimination or compensation (e.g., sky waves)
422  DF  .~.~.~ With self-orienting antenna pattern
423  DF  .~.~.~.~ Plural antennas
424  DF  .~.~.~.~.~ Tracking interferometer
425  DF  .~.~.~.~ Conical scan antenna type
426  DF  .~.~.~.~ Step track antenna type
427  DF  .~.~.~.~ Monopulse or pseuodo monopulse tracking antenna type
428  DF  .~.~.~ With continuously movable antenna pattern
429  DF  .~.~.~.~ Including a stationary antenna
430  DF  .~.~.~.~ Including plural moving antennas
431  DF  .~.~.~.~ Including a goniometer
432  DF  .~.~.~ With plural fixed antenna pattern comparing
433  DF  .~.~.~.~ Successively commutated
434  DF  .~.~.~.~.~ Including more than two antennas
435  DF  .~.~.~.~.~ By diode switching
436  DF  .~.~.~.~.~ By modulation
437  DF  .~.~.~.~ Including more than two antennas
438  DF  .~.~.~.~ Including separate indicators
439  DF  .~.~.~.~ Including combined effect indicator
440  DF  .~.~.~.~ Including a goniometer
441  DF  .~.~.~ Having a goniometer
442  DF  .~.~.~ Having a phase detector
443  DF  .~.~.~ Having a direction indicator
444  DF  .~.~.~ Having plural receivers
445  DF  .~.~.~ Having more than two antennas
446  DF  .~.~.~.~ Unequal distance between at least three antennas
447  DF  .~.~.~ Having a spiral antennas
448  DF  .~.~.~ Having a coil or loop type antenna
449  DF  .~.~.~ Having a moving antenna
450  DF  .~ Position indicating (e.g., triangulation)
451  DF  .~.~ By computer
452  DF  .~.~ By plotting table
453  DF  .~.~ By deflected or repeated signal
454  DF  .~.~ Traffic
455  DF  .~.~.~ Having collision avoidance
456  DF  .~.~.~ Having traffic control
457  DF  .~.~ Land vehicle location (e.g., bus, police car
458  DF  .~.~ Distance
459  DF  .~.~ Underground object location
460  DF  .~.~ Storm or atomic explosion location
461  DF  .~.~ With speed determination
462  DF  .~.~ With altitude determination
463  DF  .~.~ Having plural transmitters or receivers
464  DF  .~.~.~ Plural transmitters only
465  DF  .~.~.~ Plural receivers only
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FOREIGN ART COLLECTIONS
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*  DD  DIRECTIVE
*  DD  .~.~ Including a satellite
FOR 100  DF  .~.~ With position indicating (342/357)