Inventor

CLARK ROBERT V

3 patents

Patents

3 patents

US3967283AJun 29, 1976

Large area motion sensor

AUTOMATION IND INC76 citations91

US4124848ANov 7, 1978

Range limited area protection system

AUTOMATION IND INC49 citations90

US3997866ADec 14, 1976

Acoustic bus passenger counter

AUTOMATION IND INC21 citations79