Yaiman Tsui

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Kowloon, HK

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Patents Grantslast 30 patents

Information Patent Grant
Sequential locking two key lock
- Patent number 4,351,171
- Issue date Sep 28, 1982
- China National Light Industrial Products Import Export Corporation, Shantung...
- Yaiman Tsui
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES