Feng Zou

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Langfang City, CN

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Patents Grantslast 30 patents

Information Patent Grant
Lift and rotation mechanism for quick door-opening device
- Patent number 9,297,196
- Issue date Mar 29, 2016
- China National Petroleum Corporation
- Yunlan Yang
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES

Patents Applicationslast 30 patents

Information Patent Application
LIFT AND ROTATION MECHANISM FOR QUICK DOOR-OPENING DEVICE
- Publication number 20140373452
- Publication date Dec 25, 2014
- Yunlan Yang
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES