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Zhihui CAI

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  • Ningbo, CN
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Patents Grantslast 30 patents

  • Information Patent Grant

    Bottom opening password lock
    • Patent number 11,306,509
    • Issue date Apr 19, 2022
    • Zhihui Cai
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
  • Information Patent Grant

    Laminated padlock
    • Patent number 11,248,394
    • Issue date Feb 15, 2022
    • Zhihui Cai
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES

Patents Applicationslast 30 patents

  • Information Patent Application

    LAMINATED PADLOCK
    • Publication number 20210301556
    • Publication date Sep 30, 2021
    • NINGBO JIANGBEI RUIFENG LOCK INDUSTRY CO., LTD.
    • Zhihui CAI
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
  • Information Patent Application

    BOTTOM OPENING PASSWORD LOCK
    • Publication number 20200199908
    • Publication date Jun 25, 2020
    • NINGBO JIANGBEI RUIFENG LOCK INDUSTRY CO., LTD.
    • Zhihui CAI
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES