Inventor

FRERE RONALD J

US3 patents

Patents

3 patents

US4789859ADec 6, 1988

Electronic locking system and key therefor

EMHART IND197 citations96

US4848115AJul 18, 1989

Electronic locking system and key therefor

EMHART IND128 citations95

US4712398ADec 15, 1987

Electronic locking system and key therefor

EMHART IND145 citations95