Patents by Inventor Yong An Jia

Yong An Jia has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Air-operated grinding device
    Patent number: D847881
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: May 7, 2019
    Assignee: NINGBO SANKUI GRINDING MATERIAL CO., LTD.
    Inventors: Biao Guo, Yong An Jia