Jianhua Yi

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Yue Yang Xian, CN

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Patents Grantslast 30 patents

Information Patent Grant
Code changing mechanism for a mechanical combination lock
- Patent number 8,215,141
- Issue date Jul 10, 2012
- Kin Kei Hardware Industries Limited
- Jianhua Yi
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES

Patents Applicationslast 30 patents

Information Patent Application
Code Changing Mechanism for a Mechanical Combination Lock
- Publication number 20120131968
- Publication date May 31, 2012
- KIN KEI HARDWARE INDUSTRIES LIMITED
- Jianhua Yi
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES