Inventor
INGRAHAM RONALD D
US16 patents
⚠️ This page may combine multiple inventors who share the name “INGRAHAM RONALD D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NARTRON CORP
15 patentsUS4831279AMay 16, 1989
Capacity responsive control circuit
NARTRON CORP159 citations98
US5789915AAug 4, 1998
Magnetic field energy responsive position sensing apparatus and method
NARTRON CORP103 citations97
US5087825AFeb 11, 1992
Capacity responsive keyboard
NARTRON CORP75 citations96
US4758735AJul 19, 1988
DC touch control switch circuit
NARTRON CORP98 citations96
US5217280AJun 8, 1993
Pressure sensitive signal device for vehicle brake pedal
NARTRON CORP68 citations95
US5477675ADec 26, 1995
Fluid power assist method and apparatus
NARTRON CORP39 citations92
US5229579AJul 20, 1993
Motor vehicle heated seat control
NARTRON CORP44 citations92
US5010972AApr 30, 1991
Combination vehicular braking and accessory control system
NARTRON CORP29 citations92
US4978177ADec 18, 1990
Signal mechanism responsive to force applied to vehicular brake pedal and the like
NARTRON CORP44 citations92
US4731548AMar 15, 1988
Touch control switch circuit
NARTRON CORP51 citations92
US5287831AFeb 22, 1994
Vehicle starter and electrical system protection
NARTRON CORP35 citations91
US5570666ANov 5, 1996
Glow plug controller
NARTRON CORP23 citations89
US4672278AJun 9, 1987
Antenna relay method and apparatus
NARTRON CORP8 citations73
US5413072AMay 9, 1995
Vehicle starter and electrical system protection
NARTRON CORP16 citations72
US5137338AAug 11, 1992
Combination vehicular braking and accessory control system
NARTRON CORP4 citations62