Patents by Inventor Zhang Chengen

Zhang Chengen 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).

  • Facial scrubber
    Patent number: D964582
    Type: Grant
    Filed: December 8, 2020
    Date of Patent: September 20, 2022
    Assignee: Fourstar Group Inc.
    Inventor: Zhang Chengen
  • Facial scrubber
    Patent number: D1023330
    Type: Grant
    Filed: August 18, 2022
    Date of Patent: April 16, 2024
    Assignee: Fourstar Group Inc.
    Inventor: Zhang Chengen