Patents by Inventor Kin Hang Siu

Kin Hang Siu 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 purifier
    Patent number: D891599
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: July 28, 2020
    Assignee: 3M Innovative Properties Company
    Inventors: Man Li, Liliang Liu, Xuefeng Sun, Kin Hang Siu