Patents by Inventor Robert C. Manthei

Robert C. Manthei 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).

  • Patent number: D460400
    Type: Grant
    Filed: February 24, 2001
    Date of Patent: July 16, 2002
    Inventor: Robert C. Manthei
  • Patent number: D264328
    Type: Grant
    Filed: March 8, 1979
    Date of Patent: May 11, 1982
    Inventor: Robert C. Manthei