Patents/Inventors

Siqi Ma

ShanghaiCN5 patents

5 Patents

US122341222025
Authorization Management and Authorization Request of Elevator Service Request
OTIS ELEVATOR COMPANY
0 cites
US121038182024
Bluetooth Module of Elevator System
OTIS ELEVATOR COMPANY
0 cites
US120435172024
Authorization Management and Authorization Request of Elevator Service Request
OTIS ELEVATOR COMPANY
0 cites
US119391862024
Wireless Signal Device, System and Method for Elevator Service Request
OTIS ELEVATOR COMPANY
0 cites
US117082372023
Communication for Elevator Service Request
OTIS ELEVATOR COMPANY
0 cites