Accentuator circuit for underwater acoustical devices

Acoustic log

Acoustic log

Acoustic method for detecting leaks from submerged pipelines

Acoustic transponder navigation system

Acoustic wave transmitter-receiver

Active wireless network for calculators

Apparatus and method for an A/B RF redundant sensing switch

Apparatus and method for seismic exploration

Apparatus for measuring water depth

Apparatus for the measurement of flowing media according to the

Bellows caging mechanism for airborne hydrophone

Bidirectional remote control system, bidirectional remote...

Building control system communication system timing...

Building environment monitor and control system

Cable for multiple sonar systems

Cable wiper assembly

Catacoustic navigating system

Clean room system

Color display system in ultrasonic sonar