Patents by Inventor Vivian W. K. Cheng

Vivian W. K. Cheng 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).

  • Telephone set
    Patent number: D311397
    Type: Grant
    Filed: April 17, 1989
    Date of Patent: October 16, 1990
    Inventor: Vivian W. K. Cheng