Chen Yuen To

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Hong Kong, CN

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Patents Grantslast 30 patents

Information Patent Grant
Ring binder mechanism
- Patent number 9,522,561
- Issue date Dec 20, 2016
- World Wide Stationery Mfg. Co., Ltd.
- Chen Yuen To
- B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER

Patents Applicationslast 30 patents

Information Patent Application
LOW-PROFILE RING BINDER MECHANISM
- Publication number 20150104237
- Publication date Apr 16, 2015
- World Wide Stationery Mfg. Co., Ltd.
- Chen Yuen To
- B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
Information Patent Application
RING BINDER MECHANISM
- Publication number 20150063896
- Publication date Mar 5, 2015
- World Wide Stationery Mfg. Co., Ltd.
- Chen Yuen To
- B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER