Inventor
CRITCHLOW DAVID N
US21 patents
⚠️ This page may combine multiple inventors who share the name “CRITCHLOW DAVID N”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
INT MOBILE MACHINES
14 patentsUS5008900AApr 16, 1991
Subscriber unit for wireless digital subscriber communication system
INT MOBILE MACHINES131 citations98
US4825448AApr 25, 1989
Subscriber unit for wireless digital telephone system
INT MOBILE MACHINES82 citations97
US4893317AJan 9, 1990
Digital signals and frequency correction in a digital wireless system
INT MOBILE MACHINES60 citations95
US5168507ADec 1, 1992
Automatic adaptive equalizer
INT MOBILE MACHINES22 citations92
US4764940AAug 16, 1988
Modem for RF subscriber telephone system
INT MOBILE MACHINES28 citations92
US4644561AFeb 17, 1987
Modem for RF subscriber telephone system
INT MOBILE MACHINES42 citations92
US5159705AOct 27, 1992
Frequency synthesizer circuit
INT MOBILE MACHINES13 citations82
US5146473ASep 8, 1992
Subscriber unit for wireless digital subscriber communication system
INT MOBILE MACHINES14 citations82
US5101418AMar 31, 1992
Digital time-multiplexed quadrature frequency upconverter
INT MOBILE MACHINES13 citations82
US4996697AFeb 26, 1991
Deglitching means for digital communication systems
INT MOBILE MACHINES13 citations82
US4994802AFeb 19, 1991
Subscriber unit for wireless digital telephone system
INT MOBILE MACHINES14 citations82
US4881240ANov 14, 1989
AM equalizer circuit for digital systems
INT MOBILE MACHINES19 citations81
US4943983AJul 24, 1990
Subscriber unit for wireless digital telephone system
INT MOBILE MACHINES4 citations74
US5177741AJan 5, 1993
Subscriber unit for wireless digital telephone system
INT MOBILE MACHINES7 citations71
HUGHES AIRCRAFT CO
4 patentsUS5276706AJan 4, 1994
System and method for minimizing frequency offsets between digital communication stations
HUGHES AIRCRAFT CO192 citations99
US5311545AMay 10, 1994
Modem for fading digital channels affected by multipath
HUGHES AIRCRAFT CO57 citations96
US5659576AAug 19, 1997
Balanced processing based on receiver selection
HUGHES AIRCRAFT CO19 citations84
US5282226AJan 25, 1994
System and method for transmission of bursts of digital information
HUGHES AIRCRAFT CO14 citations74