| Class Number |
Class Name |
No. of Patents |
| 342/36 |
Air traffic control |
163 |
| 342/37 |
Secondary surveilance radar (ssr) or air traffic control radar beacon system (atcrbs) |
113 |
| 342/38 |
With altitude information |
29 |
| 342/40 |
With defruiting or degarbling |
51 |
| 342/39 |
With side lobe suppression |
26 |
| 342/29 |
Aircraft collision avoidance system (cas) |
231 |
| 342/30 |
With transponder |
103 |
| 342/32 |
Included in secondary surveilance radar (ssr) or air traffic control radio beacon system (atcrbs) |
99 |
| 342/31 |
Including synchronized clock |
10 |
| 342/33 |
Aircraft landing system |
99 |
| 342/34 |
Ground control approach (gca) |
20 |
| 342/35 |
Microwave landing system (mls) |
46 |
| 342/21 |
Base band system |
117 |
| 342/23 |
Berthing or docking |
18 |
| 342/24 |
Blind aid |
20 |
| 342/159 |
Clutter elimination |
501 |
| 342/160 |
Mti (moving target indicator) |
198 |
| 342/162 |
Digital |
224 |
| 342/163 |
With blind speed elimination |
25 |
| 342/164 |
With storage tube |
1 |
| 342/161 |
With vehicle movement compensation (e.g., amti (airborn mti)) |
66 |
| 342/52 |
Combined with diverse type radiant energy system |
209 |
| 342/56 |
With direction finding |
31 |
| 342/53 |
With infrared device |
132 |
| 342/54 |
With laser |
152 |
| 342/57 |
With radio voice communication |
52 |
| 342/55 |
With television |
65 |
| 342/58 |
With transmission to a remote station |
110 |
| 342/147 |
Determining direction |
203 |
| 342/156 |
Interferometer |
75 |
| 342/155 |
Lobe switching |
32 |
| 342/148 |
Low angle processing |
44 |
| 342/149 |
Monopulse |
186 |
| 342/154 |
Combined with beam steering |
67 |
| 342/151 |
With channel equalization |
35 |
| 342/150 |
With common if channel |
28 |
| 342/153 |
With particular antenna or waveguide |
73 |
| 342/152 |
With quadrature difference processing |
73 |
| 342/158 |
Scanning |
138 |
| 342/157 |
With frequency or phase steering |
141 |
| 342/118 |
Determining distance |
447 |
| 342/120 |
Altimeter |
140 |
| 342/122 |
Fm type |
63 |
| 342/121 |
With additional indicator |
26 |
| 342/146 |
Combined with determining direction |
173 |
| 342/123 |
Height finder |
57 |
| 342/124 |
Material level within container |
212 |
| 342/119 |
Miss distance indicator (mdi) |
24 |
| 342/127 |
Phase comparison |
147 |
| 342/126 |
Triangulation |
127 |
| 342/145 |
With correlation |
157 |
| 342/128 |
With frequency modulation |
297 |
| 342/133 |
Combined with determining direction |
80 |
| 342/129 |
Plural frequencies transmitted |
98 |
| 342/130 |
Plural modulation |
71 |
| 342/131 |
Combined with pulse modulation (e.g., frequency agile) |
58 |
| 342/132 |
With pulse modulation (e.g., "chirp") |
139 |
| 342/134 |
With pulse modulation |
187 |
| 342/139 |
Combined with determining direction |
54 |
| 342/141 |
Off boresight |
13 |
| 342/140 |
With azimuth and elevation determination |
63 |
| 342/142 |
With crt display |
11 |
| 342/143 |
Plural |
0 |
| 342/144 |
Ppi type |
4 |
| 342/135 |
Digital (e.g., with counter) |
175 |
| 342/136 |
With plural fixed range gates |
31 |
| 342/138 |
With type "a" or "j" range scope |
1 |
| 342/137 |
With variable pulse repetition frequency (prf) or pulse width |
116 |
| 342/125 |
With remote cooperating station |
140 |
| 342/104 |
Determining velocity |
256 |
| 342/106 |
Combined with determining acceleration |
43 |
| 342/113 |
Combined with determining direction (i.e., bearing) |
66 |
| 342/107 |
Combined with determining distance and direction |
169 |
| 342/108 |
With correlation |
66 |
| 342/109 |
Combined with determining distance |
253 |
| 342/110 |
With plural fixed range gates |
35 |
| 342/112 |
With plural frequencies transmission |
45 |
| 342/111 |
With plural receiver frequency band separation |
61 |
| 342/114 |
Combined with determining sense of motion (i.e., approaching or receding) |
119 |
| 342/115 |
Digital |
212 |
| 342/105 |
Other than doppler (e.g., range rate) |
58 |
| 342/117 |
With plural beams (e.g., "janus") |
46 |
| 342/116 |
With plural received frequency band separation |
43 |
| 342/350 |
Directive |
49 |
| 342/385 |
Beacon or receiver |
46 |
| 342/417 |
Direction-finding receiver only |
167 |
| 342/418 |
Doppler |
87 |
| 342/448 |
Having a coil or loop type antenna |
40 |
| 342/443 |
Having a direction indicator |
53 |
| 342/441 |
Having a goniometer |
12 |
| 342/449 |
Having a moving antenna |
20 |
| 342/442 |
Having a phase detector |
191 |
| 342/447 |
Having a spiral antennas |
5 |
| 342/445 |
Having more than two antennas |
80 |
| 342/446 |
Unequal distance between at least three antennas |
16 |
| 342/444 |
Having plural receivers |
72 |
| 342/419 |
Portable |
71 |
| 342/428 |
With continuously movable antenna pattern |
13 |
| 342/431 |
Including a goniometer |
6 |
| 342/429 |
Including a stationary antenna |
15 |
| 342/430 |
Including plural moving antennas |
20 |
| 342/420 |
With error or deviatioan compensator or eliminator |
35 |
| 342/421 |
Pulse-type noise elimination or compensation (e.g., sky waves) |
7 |
| 342/432 |
With plural fixed antenna pattern comparing |
59 |
| 342/440 |
Including a goniometer |
12 |
| 342/439 |
Including combined effect indicator |
8 |
| 342/437 |
Including more than two antennas |
30 |
| 342/438 |
Including separate indicators |
5 |
| 342/433 |
Successively commutated |
31 |
| 342/435 |
By diode switching |
11 |
| 342/436 |
By modulation |
14 |
| 342/434 |
Including more than two antennas |
35 |
| 342/422 |
With self-orienting antenna pattern |
38 |
| 342/425 |
Conical scan antenna type |
15 |
| 342/427 |
Monopulse or pseuodo monopulse tracking antenna type |
72 |
| 342/423 |
Plural antennas |
51 |
| 342/424 |
Tracking interferometer |
112 |
| 342/426 |
Step track antenna type |
17 |
| 342/386 |
With transmisson of bearing or position determinative signals |
123 |
| 342/407 |
Fixed course or bearing indicating |
19 |
| 342/414 |
Distinctive frequencies equi-signal type |
7 |
| 342/415 |
Coded equi-signal (e.g., a and n type) |
3 |
| 342/416 |
Sequentially effective reflectors |
0 |
| 342/410 |
Glide slope transmitter or receiver |
34 |
| 342/411 |
Receiver only |
30 |
| 342/412 |
Transmitter oly |
19 |
| 342/413 |
Localizer transmitter or receiver |
35 |
| 342/408 |
Moving beam |
51 |
| 342/409 |
With superimposed images |
5 |
| 342/387 |
Iso-chronic type |
149 |
| 342/388 |
Loran |
17 |
| 342/391 |
Loran-a |
2 |
| 342/389 |
Loran-c |
61 |
| 342/390 |
With cycle selection |
14 |
| 342/392 |
With automatic gain control |
3 |
| 342/393 |
Iso-frequency type |
7 |
| 342/394 |
Iso-phase type |
30 |
| 342/397 |
Decca |
6 |
| 342/396 |
Omega |
17 |
| 342/395 |
With hetrodyne synchronization |
3 |
| 342/398 |
Rotating beacon signal |
33 |
| 342/399 |
Tacan |
25 |
| 342/400 |
Receiver only |
11 |
| 342/401 |
Vor |
31 |
| 342/402 |
Doppler |
17 |
| 342/403 |
With circular array of antennas |
5 |
| 342/404 |
Vor |
18 |
| 342/405 |
Doppler |
17 |
| 342/406 |
With circular array of antennas |
9 |
| 342/351 |
Including a radiometer |
103 |
| 342/352 |
Including a satellite |
355 |
| 342/353 |
Having a signal repeater |
74 |
| 342/356 |
Synchronous satellite |
103 |
| 342/354 |
With beam steering |
210 |
| 342/355 |
With control of satellite altitude |
58 |
| 342/357.01 |
With position indicating |
472 |
| 342/357.05 |
Using doppler frequency shift |
104 |
| 342/357.06 |
Using global positioning satellite (gps or glonass) |
1026 |
| 342/357.11 |
Attitude determination |
90 |
| 342/357.14 |
Combined with secondary navigation system (i.e., loran, gyroscope, inertial, dead reckoning, etc.) |
244 |
| 342/357.1 |
Combined with telecommunication |
471 |
| 342/357.08 |
Determining relative position (e.g., distance or direction) |
408 |
| 342/357.12 |
Gps receiver signal processing |
587 |
| 342/357.15 |
Satellite selection (i.e., tracking or acquisition) |
246 |
| 342/357.07 |
Tracking or monitoring (i.e., lost or stolen vehicles) |
315 |
| 342/357.13 |
With storage device (i.e., map or database) |
368 |
| 342/357.09 |
With transmission of location-indicative information to or from a remote station |
576 |
| 342/357.16 |
Using low earth orbit (telecommunication) satellites |
67 |
| 342/357.02 |
With accuracy enhancing |
357 |
| 342/357.03 |
Using differential correction |
228 |
| 342/357.04 |
With ambiguity resolving |
81 |
| 342/357.17 |
With particular action taken responsive to position |
149 |
| 342/358 |
With satellite signal correction |
164 |
| 342/368 |
Including a steerable array |
540 |
| 342/377 |
Including a computer |
144 |
| 342/376 |
Including a remote energy source |
57 |
| 342/369 |
Injection radiation type |
10 |
| 342/370 |
Retrodirective |
34 |
| 342/375 |
With a delay line (e.g., serpentine transmission line, frequency scanning) |
265 |
| 342/373 |
With a matrix |
399 |
| 342/374 |
With a switch |
311 |
| 342/371 |
With electronic scanning |
160 |
| 342/372 |
Controlled |
606 |
| 342/359 |
Including antenna orientation |
343 |
| 342/360 |
Including antenna pattern plotting |
102 |
| 342/367 |
Including directive communication system |
153 |
| 342/361 |
Including polarized signal communication transmitter or receiver |
174 |
| 342/365 |
Circular |
42 |
| 342/366 |
Eliptical |
14 |
| 342/362 |
Receiver only |
83 |
| 342/363 |
Circular |
40 |
| 342/364 |
Eliptical |
11 |
| 342/450 |
Position indicating (e.g., triangulation) |
427 |
| 342/451 |
By computer |
243 |
| 342/453 |
By deflected or repeated signal |
99 |
| 342/452 |
By plotting table |
31 |
| 342/458 |
Distance |
200 |
| 342/463 |
Having plural transmitters or receivers |
339 |
| 342/465 |
Plural receivers only |
212 |
| 342/464 |
Plural transmitters only |
133 |
| 342/457 |
Land vehicle location (e.g., bus, police car |
787 |
| 342/460 |
Storm or atomic explosion location |
62 |
| 342/454 |
Traffic |
46 |
| 342/455 |
Having collision avoidance |
200 |
| 342/456 |
Having traffic control |
78 |
| 342/459 |
Underground object location |
47 |
| 342/462 |
With altitude determination |
42 |
| 342/461 |
With speed determination |
33 |
| 342/378 |
Utilizing correlation techniques |
314 |
| 342/384 |
Difference of each antenna channel signal |
45 |
| 342/379 |
Side lobe elimination |
134 |
| 342/381 |
Difference of each antenna channel signal |
61 |
| 342/382 |
Mixing each antenna channel signal |
50 |
| 342/380 |
Sum of each antenna channel signal |
113 |
| 342/383 |
Sum of each antenna signal |
195 |
| 342/59 |
Plural radar |
180 |
| 342/27 |
Presence detection only |
391 |
| 342/28 |
By motion detection |
257 |
| 342/13 |
Radar ew (electronic warfare) |
377 |
| 342/20 |
Detection of surveilance |
213 |
| 342/16 |
Eccm (electronic counter-countermeasures, i.e., antijamming) |
158 |
| 342/17 |
Radar reacts to jamming |
102 |
| 342/18 |
By changing frequency |
30 |
| 342/19 |
By varying gain or blocking receiver |
38 |
| 342/14 |
Ecm (electronic countermeasures, i.e., jamming) |
182 |
| 342/15 |
With repeater |
95 |
| 342/26R |
Radar for meteorological use (epo) |
164 |
| 342/26D |
Ground based (epo) |
118 |
| 342/26B |
Mounted on aircraft (epo) |
128 |
| 342/26A |
Mounted on satellite (epo) |
20 |
| 342/26C |
Mounted on ship (epo) |
10 |
| 342/5 |
Radar reflector |
103 |
| 342/12 |
Chaff |
61 |
| 342/7 |
Corner |
54 |
| 342/9 |
Decoy or tow target |
34 |
| 342/8 |
Inflatable or collapsable |
42 |
| 342/10 |
Inflatable or collapsable |
58 |
| 342/6 |
With modulation |
70 |
| 342/11 |
With spherical lens (e.g., luneberg lens) |
17 |
| 342/42 |
Radar transponder system |
418 |
| 342/43 |
Combined with primary radar system |
86 |
| 342/45 |
Iff or sif |
167 |
| 342/46 |
Navigational |
109 |
| 342/47 |
Distance measuring equipment (dme) |
70 |
| 342/48 |
With automatic lock-on |
12 |
| 342/49 |
With vor/tacan |
25 |
| 342/51 |
Radar transponder only |
405 |
| 342/44 |
Unique identity |
379 |
| 342/50 |
With telemetry |
137 |
| 342/1 |
Radio wave absorber |
223 |
| 342/2 |
For aircraft or missile |
70 |
| 342/3 |
For camouflage |
66 |
| 342/4 |
With particular geometric configuration |
177 |
| 342/61 |
Return signal controls external device |
134 |
| 342/63 |
Aircraft guidance |
72 |
| 342/64 |
With map matching |
84 |
| 342/65 |
With terrain avoidance or alarm |
96 |
| 342/66 |
Camera |
19 |
| 342/69 |
Device actuated by presence of land vehicle |
34 |
| 342/67 |
Gun (e.g., fire control) |
56 |
| 342/62 |
Missile or spacecraft guidance |
227 |
| 342/68 |
Proximity fuze |
106 |
| 342/70 |
Radar mounted on and controls land vehicle |
881 |
| 342/71 |
With control of brakes or steering |
245 |
| 342/72 |
With control of safety device (e.g., air bags) |
144 |
| 342/73 |
Return signal controls radar system |
66 |
| 342/74 |
Antenna control |
111 |
| 342/81 |
Beam direction by phase or frequency control |
117 |
| 342/75 |
Physical orientation |
98 |
| 342/78 |
Conical scan |
22 |
| 342/79 |
Lobe switching |
10 |
| 342/80 |
Monopulse |
69 |
| 342/76 |
With ground tracking |
11 |
| 342/77 |
With signal error correction |
47 |
| 342/89 |
Receiver |
303 |
| 342/90 |
Automatic target detection |
277 |
| 342/98 |
Frequency |
51 |
| 342/99 |
Doppler frequency tracking |
93 |
| 342/101 |
With filter control |
53 |
| 342/100 |
Wtih local osillator control |
56 |
| 342/102 |
Phase |
27 |
| 342/103 |
Phase locked loop |
69 |
| 342/91 |
Gain or threshold |
174 |
| 342/92 |
Automatic gain control (agc) |
110 |
| 342/93 |
Constant false alarm rate (cfar) |
134 |
| 342/94 |
Gating |
125 |
| 342/95 |
Automatic range tracking |
158 |
| 342/96 |
Automatic track while scan (atws) |
80 |
| 342/97 |
With automatic lock-on |
75 |
| 342/82 |
Transmitter |
127 |
| 342/83 |
Signal phase or frequency other than pulse repetition frequency (prf) |
39 |
| 342/85 |
Function of distance |
53 |
| 342/87 |
With constant beat frequency |
18 |
| 342/86 |
With constant phase |
10 |
| 342/84 |
Function of doppler frequency |
29 |
| 342/88 |
Transmission timing (e.g., ring around) |
42 |
| 342/41 |
Ship collision avoidance |
55 |
| 342/25R |
Synthetic aperture radar |
170 |
| 342/25A |
Mapping or imaging using synthetic aperture radar (epo) |
207 |
| 342/25C |
Combined with monopulse or interferometric (epo) |
67 |
| 342/25F |
Particular sar processing techniques (e.g., squint mode, doppler beam-sharpening mode, spotlight mode, bistatic sar, inverse sar) (epo) |
143 |
| 342/25B |
Specially adapted for moving target detection (epo) |
33 |
| 342/25D |
With frequency domain processing of the sar signals in azimuth (epo) |
72 |
| 342/25E |
With time domain processing of the sar signals in azimuth, e.g. time focusing (epo) |
20 |
| 342/165 |
Testing or calibrating of radar system |
325 |
| 342/173 |
By monitoring |
306 |
| 342/174 |
Calibrating |
471 |
| 342/169 |
By simulation |
123 |
| 342/171 |
Doppler |
53 |
| 342/170 |
Microwave |
47 |
| 342/172 |
With delay |
63 |
| 342/166 |
Proximity fuze |
7 |
| 342/167 |
With laser |
9 |
| 342/168 |
With noise generation |
9 |
| 342/22 |
Transmission through media other than air or free space |
393 |
| 342/60 |
Transmitting intelligence |
64 |
| 342/175 |
With particular circuit |
846 |
| 342/187 |
Augmenter |
24 |
| 342/199 |
Automatic frequency control (afc) |
49 |
| 342/194 |
Complex signal (in phase and quadrature) |
420 |
| 342/195 |
Digital processing |
1063 |
| 342/196 |
Fast fourier transform (fft) |
532 |
| 342/197 |
With video quantizer |
63 |
| 342/176 |
Display |
213 |
| 342/181 |
Color |
62 |
| 342/182 |
Electronic marker generation |
59 |
| 342/183 |
Cursor |
28 |
| 342/179 |
Image production |
272 |
| 342/177 |
Plural |
7 |
| 342/178 |
Projection type |
4 |
| 342/185 |
Scan conversion |
110 |
| 342/180 |
Stereoscopic or tridimensional |
52 |
| 342/184 |
With stabilization (e.g., true motion, true north) |
11 |
| 342/186 |
With sweep expansion |
3 |
| 342/189 |
For correlation |
239 |
| 342/200 |
For frequency modulation |
106 |
| 342/201 |
Combined with pulse modulation |
205 |
| 342/202 |
For pulse modulation |
140 |
| 342/203 |
With noise reduction |
75 |
| 342/204 |
With pulse shaping |
70 |
| 342/198 |
For receiver protection |
54 |
| 342/205 |
Sensitivity time control (stc) |
47 |
| 342/192 |
Spectrum analysis |
384 |
| 342/193 |
Harmonic |
62 |
| 342/188 |
With polarization |
178 |
| 342/190 |
With recording |
55 |
| 342/191 |
Mapping |
106 |
