Patents by Inventor Wilfred Chan

Wilfred Chan 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).

  • Motorized wheelchair
    Patent number: D287836
    Type: Grant
    Filed: October 1, 1984
    Date of Patent: January 20, 1987
    Assignee: Fortress Scientific Limited
    Inventors: Wilfred Chan, Michael Marr, Augusto De Sousa