Inventor
HARVEY ROY L
US7 patents
Patents
7 patentsUS4544836AOct 1, 1985
Optically-based access control system
AMERICAN DISTRICT TELEGRAPH CO93 citations95
US4538138AAug 27, 1985
Integrated security system having a multiprogrammed controller
AMERICAN DISTRICT TELEGRAPH CO87 citations91
US4634846AJan 6, 1987
Multimode programmable stand-alone access control system
AMERICAN DISTRICT TELEGRAPH CO49 citations86
US4423410ADec 27, 1983
Two-wire multi-zone alarm system
AMERICAN DISTRICT TELEGRAPH CO25 citations81
US4359721ANov 16, 1982
Two-wire multi-zone alarm system
AMERICAN DISTRICT TELEGRAPH CO20 citations81
US4491828AJan 1, 1985
Two-wire multi-zone alarm system
AMERICAN DISTRICT TELEGRAPH CO19 citations73
US4468664AAug 28, 1984
Non-home run zoning system
AMERICAN DISTRICT TELEGRAPH CO14 citations72