Patents by Inventor Joseph Kwok-Yuen Chan

Joseph Kwok-Yuen 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).

  • Patent number: D331017
    Type: Grant
    Filed: November 21, 1990
    Date of Patent: November 17, 1992
    Assignee: Hop Hing Oil Pty. Ltd.
    Inventor: Joseph Kwok-Yuen Chan