TREA

Guoyan Gao

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  • Tangshan, CN
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Patents Grantslast 30 patents

  • Information Patent Grant

    Rail train
    • Patent number 12,233,921
    • Issue date Feb 25, 2025
    • CRRC TANGSHAN CO., LTD.
    • Liqing Ding
    • B61 - RAILWAYS
  • Information Patent Grant

    Sleeping car compartment and sleeping car
    • Patent number 11,279,383
    • Issue date Mar 22, 2022
    • CRRC TANGSHAN CO., LTD.
    • Xiayan Li
    • B61 - RAILWAYS

Patents Applicationslast 30 patents

  • Information Patent Application

    RAIL TRAIN
    • Publication number 20220001903
    • Publication date Jan 6, 2022
    • CRRC TANGSHAN CO., LTD.
    • Liqing DING
    • B61 - RAILWAYS
  • Information Patent Application

    SLEEPING CAR COMPARTMENT AND SLEEPING CAR
    • Publication number 20200122750
    • Publication date Apr 23, 2020
    • CRRC TANGSHAN CO., LTD.
    • Xiayan Li
    • B61 - RAILWAYS