Inventor
OLTHUIS MARK
US5 patents
Patents
5 patentsUS10294074B2May 21, 2019
Elevator recovery car
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US10691779B2Jun 23, 2020
Service tool credential management
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US10939477B2Mar 2, 2021
Service tool wireless access management
OTIS ELEVATOR CO1 citations60
US10244374B2Mar 26, 2019
Service tool proximity detection
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US10669122B2Jun 2, 2020
Service tool location-based function availability
OTIS ELEVATOR CO0 citations48