Electronic heading sensors for determining direction; ultrasonic application measuring and searching machines, namely, ultrasonic flaw detectors ultrasonic sensors, ultrasonic instrumentation for testing machines, ultrasonic object detectors for use on vehicles, and ultrasonic imaging apparatus, not for medical purposes; digital communication type remote measuring and controlling machines and instruments, namely, remote controls for motors, remote control telemetering machines and instruments...

electronic survey and position detection systems and components therefor; namely, compasses, underwater sonic transducers, computer program software, and radio communication equipment; namely, receivers and transmitters

DIGITAL READOUT ELECTRONIC COMPASS