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Hung Yu Cheng

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  • Shatin, HK
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Patents Grantslast 30 patents

Patents Applicationslast 30 patents

  • Information Patent Application

    LEVER-ARCH TYPE FILE MECHANISM
    • Publication number 20090041531
    • Publication date Feb 12, 2009
    • Chun Yuen To
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Application

    PUNCH
    • Publication number 20080184860
    • Publication date Aug 7, 2008
    • LECO STATIONERY MANUFACTURING COMPANY LIMITED
    • Hung Yu Cheng
    • B26 - HAND CUTTING TOOLS CUTTING SEVERING
  • Information Patent Application

    LEVER-ARCH TYPE FILE MECHANISM
    • Publication number 20080166179
    • Publication date Jul 10, 2008
    • Xi Tao DENG
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Application

    RING BINDER MECHANISM HAVING PLASTIC HOUSING
    • Publication number 20080085145
    • Publication date Apr 10, 2008
    • WORLD WIDE STATIONERY MANUFACTURING COMPANY LIMITED
    • Chun Yuen To
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Application

    Ring binder mechanism spring biased to a locked position when ring...
    • Publication number 20060147253
    • Publication date Jul 6, 2006
    • World Wide Stationery Mfg. Co., Ltd.
    • Hung Yu Cheng
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Application

    Ring binder ring locking
    • Publication number 20030103796
    • Publication date Jun 5, 2003
    • World Wide Stationery Manufacturing Company, Limited
    • Chun On To
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Application

    Ring binder mechanism
    • Publication number 20030103798
    • Publication date Jun 5, 2003
    • World Wide Stationery Manufacturing Company, Ltd.
    • Hung Yu Cheng
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER