Patents by Inventor John C. Wan

John C. Wan 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).

  • Toothbrush
    Patent number: 5419001
    Abstract: A toothbrush having the following combination of bristles: bristles that taper downward at the front of the toothbrush relative to the rear of the toothbrush, a central row of bristles that is the tallest and hardest, and side rows of bristles that are softer and shorter.
    Type: Grant
    Filed: March 29, 1994
    Date of Patent: May 30, 1995
    Inventor: John C. Wan
  • Toothbrush
    Patent number: D365683
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: January 2, 1996
    Inventor: John C. Wan