4 Patents
- US122341222025Authorization Management and Authorization Request of Elevator Service Request
OTIS ELEVATOR COMPANY
0 cites - US120435172024Authorization Management and Authorization Request of Elevator Service Request
OTIS ELEVATOR COMPANY
0 cites - US119391862024Wireless Signal Device, System and Method for Elevator Service Request
OTIS ELEVATOR COMPANY
0 cites - 0 cites