TREA

Jen Sen Chiang

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  • Zhongli City, TW
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Patents Grantslast 30 patents

  • Information Patent Grant

    Safety braking device for doors
    • Patent number 9,371,672
    • Issue date Jun 21, 2016
    • Wen Chang Tseng
    • Wen Chang Tseng
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES

Patents Applicationslast 30 patents

  • Information Patent Application

    SAFETY BRAKING DEVICE FOR DOORS
    • Publication number 20140053370
    • Publication date Feb 27, 2014
    • Wen Chang Tseng
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES