Yongkang QIAO

Person

  • Beijing, CN

Patents Grantslast 30 patents

  • Information Patent Grant

    Mask and evaporation device

    • Patent number 10,465,277
    • Issue date Nov 5, 2019
    • BOE Technology Group Co., Ltd.
    • Peng Xu
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...

Patents Applicationslast 30 patents