Patents by Inventor Ivy W. M. Yiu

Ivy W. M. Yiu 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).

  • Electronic educational game housing
    Patent number: D407748
    Type: Grant
    Filed: April 9, 1996
    Date of Patent: April 6, 1999
    Assignee: VTech Industries, LLC
    Inventors: Frederick L. T. Tsang, Ivy W. M. Yiu
  • Electronic learning aid housing
    Patent number: D420404
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: February 8, 2000
    Assignee: Vtech Electronics Limited
    Inventor: Ivy W. M. Yiu