P

Inventor

HU CHARLES C

14 patents
⚠️ This page may combine multiple inventors who share the name “HU CHARLES C”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

WATT STOPPER

7 patents
US5598042AJan 28, 1997

Moveable desktop load controller

WATT STOPPER171 citations98
US5455487AOct 3, 1995

Moveable desktop light controller

WATT STOPPER272 citations98
US5804991ASep 8, 1998

Zero crossing circuit for a relay

WATT STOPPER71 citations95
US5640113AJun 17, 1997

Zero crossing circuit for a relay

WATT STOPPER62 citations95
US5406173AApr 11, 1995

Apparatus and method for adjusting lights according to the level of ambient light

WATT STOPPER139 citations95
US5124546AJun 23, 1992

Method and apparatus for refracting light to an optical detector

WATT STOPPER16 citations73
US5124566AJun 23, 1992

Shutoff circuit for sensor controlled switch

WATT STOPPER16 citations73

THE WATT STOPPER

3 patents
USD380452SJul 1, 1997

Wall-mounted switch

THE WATT STOPPER33 citations91
USD369348SApr 30, 1996

Light level controller

THE WATT STOPPER12 citations73
USD360842SAug 1, 1995

Motion sensor

THE WATT STOPPER16 citations73

WATT WATCHER INC

2 patents
US4820938AApr 11, 1989

Low voltage motion sensor for activating a high voltage load

WATT WATCHER INC51 citations91
US4661720AApr 28, 1987

Occupancy sensor

WATT WATCHER INC49 citations89

WATT STOPPER INC

1 patent
US5189393AFeb 23, 1993

Dual technology motion sensor

WATT STOPPER INC166 citations98

THE WATT WATCHER INC

1 patent
USD294231SFeb 16, 1988

Occupancy sensor

THE WATT WATCHER INC50 citations91