Patents by Inventor Lingfung Sin

Lingfung Sin 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).

  • Hat rack
    Patent number: D1128303
    Type: Grant
    Filed: April 1, 2025
    Date of Patent: June 2, 2026
    Assignee: HUI ZHOU TIAN CHANG INDUSTRIAL CO., LTD.
    Inventors: Lingfung Sin, Yanchang Ma, Bailin Wu, Wenlong Yan