TREA

Xiuzhi Zhang

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  • Shanghai, CN
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Patents Grantslast 30 patents

  • Information Patent Grant

    Combination lock
    • Patent number 9,464,463
    • Issue date Oct 11, 2016
    • Shanghai Saintsung Polytron Technologies Inc.
    • Chengfan Bao
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
  • Information Patent Grant

    Wheel type laser encoding device and code reading method
    • Patent number 8,777,107
    • Issue date Jul 15, 2014
    • Shanghai Shengxiang Science and Technology Co., Ltd.
    • Chengfan Bao
    • G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

  • Information Patent Application

    Combination Lock
    • Publication number 20140366592
    • Publication date Dec 18, 2014
    • Chengfan Bao
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES