Cable wiper
Car obstacle monitoring system
Castable fish/depth finder
Cavitating body sonar system and process
Charging circuit for sonar systems
Color sonar for underwater object collision avoidance
Combination tape measure and range finder
Commutator and fiber brush rotating disc
Contact ultrasonic transducer head
Container and adaptor for use with fluid volume sensor
Current loop control circuit for a time of flight ranging...
Curvilinear wideband, projected derivative-matched, continuous a