Inventor
HUGHES DAVID M
US13 patents
⚠️ This page may combine multiple inventors who share the name “HUGHES DAVID M”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
OTIS ELEVATOR CO
8 patentsUS5200583AApr 6, 1993
Adaptive elevator security system
OTIS ELEVATOR CO100 citations94
US5487451AJan 30, 1996
System and method for determining the availability of an elevator car for response to hall calls
OTIS ELEVATOR CO34 citations91
US5357064AOct 18, 1994
Elevator hall call cross-cancellation device
OTIS ELEVATOR CO31 citations88
US5644110AJul 1, 1997
Elevator service for dual lobby during up-peak
OTIS ELEVATOR CO11 citations73
US10227209B2Mar 12, 2019
Orchestration of an occupant evacuation operation using destination entry fixtures
OTIS ELEVATOR CO2 citations72
US10011460B2Jul 3, 2018
Elevator dynamic displays for messaging and communication
OTIS ELEVATOR CO2 citations72
US5272287ADec 21, 1993
Elevator car and riser transfer
OTIS ELEVATOR CO16 citations71
US10294075B2May 21, 2019
Re-dispatching unoccupied elevator car for occupant evacuation operation
OTIS ELEVATOR CO0 citations40