TREA

Jason Chang

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  • Daxi Township, TW
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Patents Grantslast 30 patents

  • Information Patent Grant

    Adjustable hinged door closer
    • Patent number 8,181,311
    • Issue date May 22, 2012
    • Heng Kuo Co., Ltd.
    • Chi-Tsao Chiang
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES

Patents Applicationslast 30 patents

  • Information Patent Application

    ADJUSTABLE HINGED DOOR CLOSER
    • Publication number 20110030167
    • Publication date Feb 10, 2011
    • HENG KUO Co., Ltd.
    • Chi-Tsao Chiang
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES