Ho Ping Cheng

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New Territories, HK

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Patents Grantslast 30 patents

Information Patent Grant
Ring metals with linkage locking device
- Patent number 6,036,394
- Issue date Mar 14, 2000
- World Wide Stationary Manufacturing Co., Ltd.
- Ho Ping Cheng
- B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER