Patents by Inventor Pui-Chung Lau

Pui-Chung Lau 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: D369831
    Type: Grant
    Filed: November 25, 1994
    Date of Patent: May 14, 1996
    Assignee: Vtech Industries, Inc.
    Inventors: Ka-Wah Chow, Pui-Chung Lau
  • Infant activity gymnasium unit
    Patent number: D374691
    Type: Grant
    Filed: November 25, 1994
    Date of Patent: October 15, 1996
    Assignee: VTECH Industries, Inc.
    Inventors: Ka-Wah Chow, Pui-Chung Lau
  • Infant activity gymnasium unit
    Patent number: D387814
    Type: Grant
    Filed: May 31, 1996
    Date of Patent: December 16, 1997
    Assignee: Vtech Industries, L.L.C.
    Inventors: Ka-Wah Chow, Pui-Chung Lau
  • Clock
    Patent number: D423945
    Type: Grant
    Filed: April 7, 1999
    Date of Patent: May 2, 2000
    Assignee: Ezech Limited
    Inventor: Pui Chung Lau