Communications, Electrical: Acoustic Wave Systems And Devices Patents (Class 367)

Sonar counter-measures (Class 367/1)

Transponders (Class 367/2)

Acoustic image conversion (Class 367/7)

Beam stabilization or compensation (Class 367/12)

Testing, monitoring, or calibrating (Class 367/13)

Seismic prospecting (Class 367/14)

Wellbore telemetering (Class 367/81)

Borehole testing (Class 367/86)

Echo systems (Class 367/87)

Plural transmitters to receiver or transmitter to plural receivers (Class 367/117)

Selective (e.g., remote control) (Class 367/197)

Distance or direction finding (Class 367/118)

Underwater system (Class 367/131)

Receiver circuitry (Class 367/135)

Transmitter systems (Class 367/137)

Signal transducers (Class 367/140)

Miscellaneous (Class 367/191)

Sonar time varied gain control systems (Class 367/900)

Noise or unwanted signal reduction in nonseismic receiving system (Class 367/901)

Speed of sound compensation (Class 367/902)

Transmit-receive circuitry (Class 367/903)

Doppler compensation systems (Class 367/904)

Side lobe reduction or shading (Class 367/905)

Airborne shock-wave detection (Class 367/906)

Coordinate determination (Class 367/907)

Material level detection, e.g., liquid level (Class 367/908)

Collision avoidance (Class 367/909)

Portable sonar devices (Class 367/910)

Particular well-logging apparatus (Class 367/911)

Class-related foreign documents (Class 367/FOR000)