Patents by Inventor Dorothy J. Poston

Dorothy J. Poston 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).

  • Toilet plunger
    Patent number: D450895
    Type: Grant
    Filed: August 23, 2000
    Date of Patent: November 20, 2001
    Inventor: Dorothy J. Poston
  • Toilet plunger
    Patent number: D457277
    Type: Grant
    Filed: August 9, 2001
    Date of Patent: May 14, 2002
    Inventor: Dorothy J. Poston