Assignee
ENG SYST
8 patents
Top patents by PatentIndex Score
US4022038AMay 10, 1977
Magnetically operated locking device and key
ENG SYST46 citations92
US4117462ASep 26, 1978
Ultrasonic transmitter for burglar alarm system
ENG SYST21 citations81
US4023157AMay 10, 1977
Theft alarm for portable articles
ENG SYST30 citations81
US4365750ADec 28, 1982
Adjustable sprinkler system
ENG SYST19 citations73
US4280025AJul 21, 1981
Lockable cover assembly for push-button key pad
ENG SYST8 citations73
US4106442AAug 15, 1978
Device for increasing fuel economy of an internal combustion engine
ENG SYST7 citations73
US4097809AJun 27, 1978
Local event broadcast system
ENG SYST12 citations73
US4164911AAug 21, 1979
Apparatus for re-inking printing ribbons
ENG SYST6 citations56