TREA

World Wide Stationary Mfg. Co., Ltd.

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  • Hong Kong, CN
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Patents Grantslast 30 patents

  • Information Patent Grant

    Ring binder mechanism
    • Patent number 8,801,317
    • Issue date Aug 12, 2014
    • World Wide Stationary Mfg. Co., Ltd.
    • Jn Biao Pi
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER