Patents by Inventor Maggie Pui Sze Cheung

Maggie Pui Sze Cheung 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).

  • Tint bowl with brush
    Patent number: D471017
    Type: Grant
    Filed: April 18, 2002
    Date of Patent: March 4, 2003
    Inventor: Maggie Pui Sze Cheung
  • Tint bowl
    Patent number: D471668
    Type: Grant
    Filed: April 22, 2002
    Date of Patent: March 11, 2003
    Inventor: Maggie Pui Sze Cheung
  • Crown head hair roller
    Patent number: D543659
    Type: Grant
    Filed: April 27, 2006
    Date of Patent: May 29, 2007
    Inventor: Maggie Pui Sze Cheung
  • Hair roller
    Patent number: D543660
    Type: Grant
    Filed: April 27, 2006
    Date of Patent: May 29, 2007
    Inventor: Maggie Pui Sze Cheung