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Naichang Shen

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  • Chengdu, CN
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Patents Grantslast 30 patents

  • Information Patent Grant

    Bicycle crank driven chain wheel assembly
    • Patent number 5,611,744
    • Issue date Mar 18, 1997
    • Sichuan Xinxin Mechanical Engineering Co., Ltd.
    • Naichang Shen
    • B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS