Patents by Inventor Guanliang Xu

Guanliang Xu 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).

  • Pen holder
    Patent number: D870808
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: December 24, 2019
    Assignee: NINGBO CONDA ART MATERIAL GROUP CO., LTD.
    Inventor: Guanliang Xu
  • Paintbrush handle
    Patent number: D939839
    Type: Grant
    Filed: April 2, 2020
    Date of Patent: January 4, 2022
    Assignee: NINGBO CONDA ART SUPPLIES GROUP CO., LTD.
    Inventor: Guanliang Xu