Vincent W. M. Tung

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Kowloon, HK

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Patents Grantslast 30 patents

Information Patent Grant
Metal ring binder with auxiliary springs
- Patent number 6,045,286
- Issue date Apr 4, 2000
- Hong Kong Stationery Manufacturing Co., Ltd.
- Vincent W. M. Tung
- B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
Information Patent Grant
Locking booster ring binder mechanism
- Patent number 5,904,435
- Issue date May 18, 1999
- Hong Kong Stationary Manufacturing Co., Ltd.
- Vincent W. M. Tung
- B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER