Hui-Chen Chang

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Xinwu Township, TW

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Patents Grantslast 30 patents

Information Patent Grant
Adjustable door closer
- Patent number 8,863,357
- Issue date Oct 21, 2014
- Heng Kuo Co., Ltd.
- Hui-Chen Chang
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES

Patents Applicationslast 30 patents

Information Patent Application
ADJUSTABLE DOOR CLOSER
- Publication number 20140331449
- Publication date Nov 13, 2014
- HENG KUO Co., Ltd.
- Hui-Chen Chang
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES