Patents by Inventor Patrick Ian Tsang

Patrick Ian Tsang 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).

  • Mask keeper
    Patent number: D958336
    Type: Grant
    Filed: September 18, 2020
    Date of Patent: July 19, 2022
    Inventor: Patrick Ian Tsang