Patents by Inventor Kam-Tong So

Kam-Tong So 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).

  • Electric hand drill
    Patent number: D337710
    Type: Grant
    Filed: August 20, 1991
    Date of Patent: July 27, 1993
    Assignee: Choon Nang Electrical Appliance Mfty. Ltd.
    Inventors: Tat-Nin Lui, Kam-Tong So