| Class Number |
Class Name |
No. of Patents |
| 367/7 |
Acoustic image conversion |
183 |
| 367/8 |
Acoustic holography |
45 |
| 367/10 |
Liquid or deformable surface holography |
13 |
| 367/9 |
Seismic display |
7 |
| 367/11 |
With memory means |
120 |
| 367/906 |
Airborne shock-wave detection |
67 |
| 367/12 |
Beam stabilization or compensation |
53 |
| 367/86 |
Borehole testing |
78 |
| 367/909 |
Collision avoidance |
140 |
| 367/907 |
Coordinate determination |
93 |
| 367/118 |
Distance or direction finding |
133 |
| 367/124 |
By combining or comparing signals |
184 |
| 367/126 |
Addition or subtraction |
69 |
| 367/125 |
Phase comparison and/or correlation |
124 |
| 367/119 |
With beam steering, scanning, or focussing |
81 |
| 367/121 |
By electrical means |
31 |
| 367/122 |
Transducer switching or gating |
51 |
| 367/123 |
With phase shifter or delay means |
86 |
| 367/120 |
By transducer movement |
37 |
| 367/128 |
With electromagnetic wave |
86 |
| 367/129 |
With plurality of transducers |
129 |
| 367/127 |
With time interval measuring means |
205 |
| 367/130 |
With towing |
124 |
| 367/904 |
Doppler compensation systems |
39 |
| 367/87 |
Echo systems |
177 |
| 367/99 |
Distance or direction finding |
385 |
| 367/101 |
Frequency modulation |
70 |
| 367/102 |
Linear modulation (e.g., sawtooth) |
30 |
| 367/103 |
With beam steering, scanning, or focussing |
206 |
| 367/104 |
By transducer movement |
79 |
| 367/105 |
Transducer switching or gating |
141 |
| 367/100 |
With correlation or matched filtering |
110 |
| 367/107 |
With indicator |
60 |
| 367/112 |
Alarm |
50 |
| 367/116 |
Audible or tactile |
57 |
| 367/113 |
Cathode-ray tube |
63 |
| 367/110 |
Color display |
27 |
| 367/108 |
Digital readout |
105 |
| 367/111 |
Luminous array |
56 |
| 367/114 |
Meter |
10 |
| 367/115 |
Permanent record |
49 |
| 367/109 |
Rotating lamp |
23 |
| 367/106 |
With towing |
122 |
| 367/92 |
Parametric sonar |
45 |
| 367/93 |
Presence or movement only detection |
233 |
| 367/94 |
By doppler effect |
114 |
| 367/95 |
Returned signal used for control |
80 |
| 367/96 |
External device |
163 |
| 367/97 |
Receiver system |
82 |
| 367/98 |
Automatic gain or threshold control |
111 |
| 367/88 |
Side scanning or contour mapping sonar systems |
187 |
| 367/89 |
Speed determination |
78 |
| 367/90 |
By doppler effect |
91 |
| 367/91 |
Vehicle mounted system for determining vehicle speed |
46 |
| 367/908 |
Material level detection, e.g., liquid level |
200 |
| 367/191 |
Miscellaneous |
100 |
| 367/901 |
Noise or unwanted signal reduction in nonseismic receiving system |
184 |
| 367/911 |
Particular well-logging apparatus |
137 |
| 367/912 |
Particular transducer |
70 |
| 367/117 |
Plural transmitters to receiver or transmitter to plural receivers |
86 |
| 367/910 |
Portable sonar devices |
92 |
| 367/135 |
Receiver circuitry |
226 |
| 367/136 |
Responsive to intruder energy |
102 |
| 367/14 |
Seismic prospecting |
81 |
| 367/37 |
Land-reflection type |
54 |
| 367/68 |
Display systems |
61 |
| 367/72 |
3-d |
61 |
| 367/70 |
Color |
39 |
| 367/71 |
Crt |
28 |
| 367/69 |
Well logging type |
56 |
| 367/74 |
Format conversion |
49 |
| 367/75 |
Shear wave |
212 |
| 367/38 |
Signal analysis and/or correction |
231 |
| 367/47 |
Amplitude |
98 |
| 367/58 |
By receiver pattern arrangement |
47 |
| 367/59 |
Compositing system |
87 |
| 367/62 |
Array weighting |
24 |
| 367/61 |
Beam steering |
21 |
| 367/60 |
Special digital system |
33 |
| 367/63 |
With preliminary signal processing |
63 |
| 367/43 |
Filters |
103 |
| 367/45 |
Adaptive filters |
61 |
| 367/44 |
Comb filters |
9 |
| 367/46 |
Inverse filters |
68 |
| 367/49 |
Frequency |
82 |
| 367/65 |
Gain control |
34 |
| 367/66 |
Analog/digital compatible systems |
15 |
| 367/67 |
Digital |
39 |
| 367/64 |
Optical processing |
9 |
| 367/56 |
Particular source-receiver array |
100 |
| 367/57 |
Vertical receiver or source array |
118 |
| 367/48 |
Phase |
51 |
| 367/39 |
Random signal correlation |
36 |
| 367/40 |
Received correlation |
80 |
| 367/42 |
Standard correlation |
23 |
| 367/50 |
Timing correction |
87 |
| 367/51 |
Dynamic timing correction |
43 |
| 367/52 |
Normal moveout |
59 |
| 367/53 |
For dip |
67 |
| 367/54 |
For weathering layer |
25 |
| 367/55 |
Timing mark generation |
21 |
| 367/41 |
Transmitted correlation |
84 |
| 367/73 |
Synthetic seismograms and models |
216 |
| 367/76 |
Telemetry |
86 |
| 367/78 |
Multiplex |
26 |
| 367/80 |
Frequency |
14 |
| 367/79 |
Time |
59 |
| 367/77 |
Radio wave |
61 |
| 367/36 |
Land-refraction type |
34 |
| 367/15 |
Offshore prospecting |
169 |
| 367/20 |
Multiple hydrophone cable systems |
222 |
| 367/21 |
Signal processing |
157 |
| 367/23 |
Controlled source signalling |
74 |
| 367/24 |
Reverberation removal |
91 |
| 367/22 |
Transducer output weighting |
24 |
| 367/19 |
Transducer cable location determination |
82 |
| 367/16 |
Transducer position control |
88 |
| 367/18 |
Fluid variation |
18 |
| 367/17 |
Hydromechanical |
40 |
| 367/25 |
Well logging |
266 |
| 367/28 |
Amplitude measurement |
37 |
| 367/30 |
Amplitude comparison |
49 |
| 367/32 |
Frequency dependent determination |
62 |
| 367/31 |
Of noncompressional acoustic wave energy |
134 |
| 367/29 |
Peak amplitude |
24 |
| 367/35 |
Borehole or casing condition |
178 |
| 367/33 |
Depth recording or control |
51 |
| 367/34 |
Received signal cycle discrimination |
36 |
| 367/26 |
Threshold set system |
29 |
| 367/27 |
Time interval measurement |
99 |
| 367/197 |
Selective (e.g., remote control) |
96 |
| 367/199 |
Frequency responsive actuation |
57 |
| 367/198 |
Humanly generated sound or speech responsive (e.g., human whistle) |
82 |
| 367/905 |
Side lobe reduction or shading |
83 |
| 367/140 |
Signal transducers |
279 |
| 367/178 |
Receivers |
105 |
| 367/181 |
Capacitive |
63 |
| 367/188 |
Casing or housing |
124 |
| 367/182 |
Moving coil |
26 |
| 367/184 |
Having arcuate movement |
2 |
| 367/183 |
Spider spring |
12 |
| 367/185 |
Moving magnet |
26 |
| 367/186 |
Having arcuate movement |
2 |
| 367/187 |
Spider spring |
13 |
| 367/179 |
Pendulum type |
13 |
| 367/180 |
Piezoelectric |
50 |
| 367/177 |
Towed land cables |
21 |
| 367/141 |
Underwater type |
90 |
| 367/170 |
Electret |
31 |
| 367/169 |
Elongated continuous type |
26 |
| 367/149 |
Exclusive-type receiver |
190 |
| 367/142 |
Exclusive-type transmitter |
60 |
| 367/144 |
Air guns |
141 |
| 367/148 |
Electrically driven underwater bells or sirens |
8 |
| 367/145 |
Explosives |
31 |
| 367/143 |
Hydraulically driven vibrator |
43 |
| 367/146 |
Implosion devices |
31 |
| 367/147 |
Spark discharge devices |
52 |
| 367/171 |
Liquid filled transducer |
72 |
| 367/168 |
Magnetostrictive |
46 |
| 367/157 |
Piezoelectric |
184 |
| 367/160 |
Bending type |
51 |
| 367/161 |
Multimorph |
14 |
| 367/159 |
Elongated cylindrical element |
97 |
| 367/158 |
Head and tail mass |
73 |
| 367/166 |
Liquid filled |
59 |
| 367/167 |
Pressure compensating means |
47 |
| 367/164 |
Single element having a plurality of electrodes |
37 |
| 367/165 |
Specific support structure |
159 |
| 367/163 |
With diaphragm |
118 |
| 367/162 |
With resonant or damping structure |
120 |
| 367/153 |
Plural transducer array |
179 |
| 367/154 |
Line array |
198 |
| 367/156 |
Magnetostrictive |
27 |
| 367/155 |
Piezoelectric |
172 |
| 367/174 |
Transducer with diaphragm |
116 |
| 367/175 |
Diaphragm with electric driving coil |
60 |
| 367/172 |
Transducer with pressure compensating means |
67 |
| 367/176 |
Transducer with resonant or damping structure |
108 |
| 367/173 |
Transducer with support |
189 |
| 367/152 |
With impedance matching means |
74 |
| 367/150 |
With modifying lens |
72 |
| 367/151 |
With reflector |
92 |
| 367/189 |
Vibrator-type transmitter |
113 |
| 367/190 |
With feedback control |
43 |
| 367/1 |
Sonar counter-measures |
125 |
| 367/900 |
Sonar time varied gain control systems |
58 |
| 367/902 |
Speed of sound compensation |
82 |
| 367/13 |
Testing, monitoring, or calibrating |
279 |
| 367/903 |
Transmit-receive circuitry |
73 |
| 367/137 |
Transmitter systems |
135 |
| 367/139 |
Animal control |
136 |
| 367/138 |
With beam forming, shaping, steering, or scanning |
149 |
| 367/2 |
Transponders |
65 |
| 367/3 |
Sonobuoys and sonobuoy systems |
69 |
| 367/4 |
With component activating or deployment means |
95 |
| 367/5 |
With plurality of sonobuoys |
18 |
| 367/6 |
With plurality of transponders |
57 |
| 367/131 |
Underwater system |
215 |
| 367/132 |
Analog speech communication |
44 |
| 367/133 |
Remote control |
59 |
| 367/134 |
Telemetering |
148 |
| 367/81 |
Wellbore telemetering |
98 |
| 367/82 |
Through drill string or casing |
150 |
| 367/83 |
Through well fluids |
178 |
| 367/85 |
Linear valve control |
66 |
| 367/84 |
Rotary valve control |
48 |
