Chong Chen

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Hangzhou, CN

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Patents Grantslast 30 patents

Information Patent Grant
Elevator synchronous door knife
- Patent number 10,427,914
- Issue date Oct 1, 2019
- Otis Elevator Company
- XiaoBo Zhang
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Landing-door door lock device
- Patent number 10,189,680
- Issue date Jan 29, 2019
- Otis Elevator Company
- Yongtao Yang
- B66 - HOISTING LIFTING HAULING

Patents Applicationslast 30 patents

Information Patent Application
ELEVATOR CAR DOOR LOCKING DEVICE AND ELEVATOR EQUIPMENT
- Publication number 20240158206
- Publication date May 16, 2024
- Otis Elevator Company
- Chong Chen
- B66 - HOISTING LIFTING HAULING
Information Patent Application
ELEVATOR SYNCHRONOUS DOOR KNIFE
- Publication number 20180265332
- Publication date Sep 20, 2018
- Otis Elevator Company
- XiaoBo Zhang
- B66 - HOISTING LIFTING HAULING
Information Patent Application
LANDING-DOOR DOOR LOCK DEVICE
- Publication number 20170267495
- Publication date Sep 21, 2017
- Otis Elevator Company
- Yongtao Yang
- B66 - HOISTING LIFTING HAULING