Dopplerizing a signal of varying frequency

Dual beam sonar display system

Echo sounder for detecting schools of fish

Echo sounding device with cathode ray tube display

Electrical appliance with communication interface

Electrical control apparatus including a plurality of...

Electronic control unit for a motor vehicle with data...

Electronic lock system and method for its use with card only...

Electronically stabilized beam former system

Enclosure system allowing for hot work within the vicinity...

Encoded echo-ranging signal generator

Equipment housing with interfacing computer

Event-recorder for transmitting and storing electronic...

Event-recorder for transmitting and storing electronic...

Fish counter

Fish finder capable of discriminating sizes of fish

Fish locator

Fish-finder

Flasher display type fish finder

Furniture unit having a modular communication network