Patents by Inventor Joseph Kwai Leung Ma

Joseph Kwai Leung Ma 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).

  • Wrist watch
    Patent number: D410854
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: June 15, 1999
    Assignee: Imus Co., Ltd.
    Inventors: Jimmy Tsz Kin Cheung, Hiu Fung Cheung, Joseph Kwai Leung Ma