Inventor
YOULA JEAN
US6 patents
Patents
6 patentsUS5039832AAug 13, 1991
Touch button light ring system
OTIS ELEVATOR CO71 citations94
US5036321AJul 30, 1991
Capacitive sensing, solid state touch button system
OTIS ELEVATOR CO131 citations94
USD318632SJul 30, 1991
Call button indicator and wall plate for elevators
OTIS ELEVATOR CO17 citations80
US4147235AApr 3, 1979
Elevator control system
OTIS ELEVATOR CO15 citations71
US5313026AMay 17, 1994
Electronic stepper to determine elevator car position, with automatic error correction and immunity from power failure
OTIS ELEVATOR CO12 citations65
US4847728AJul 11, 1989
Detecting a defective suppressor diode in a coil driving circuit
OTIS ELEVATOR CO5 citations60