Patents by Inventor Ralph G. Merkel

Ralph G. Merkel 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 holder
    Patent number: D500221
    Type: Grant
    Filed: May 12, 2004
    Date of Patent: December 28, 2004
    Inventor: Ralph G. Merkel
  • Toothbrush holder
    Patent number: D327194
    Type: Grant
    Filed: April 20, 1990
    Date of Patent: June 23, 1992
    Inventor: Ralph G. Merkel