Tung-Ming Chang

Follow

Person

Dongguan City, CN

People

Patents Grantslast 30 patents

Information Patent Grant
Humanized convenient door lock
- Patent number 9,963,918
- Issue date May 8, 2018
- DONGGUAN DAZHAN METAL CO., LTD.
- Tung-Ming Chang
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES

Patents Applicationslast 30 patents

Information Patent Application
HUMANIZED CONVENIENT DOOR LOCK
- Publication number 20170074011
- Publication date Mar 16, 2017
- Dongguan Dazhan Metal Co., Ltd.
- Tung-Ming Chang
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES