Patents by Inventor Robert C. Warfel

Robert C. Warfel 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).

  • Decorative rock product
    Patent number: 6248411
    Abstract: A hollow decorative rock protects and provides an aesthetically pleasing appearance by covering utility implements or access covers. Hidden slots in the hollow rock provide for an air flow through the rock, when combined with the uneven bottom edge of the molded hollow rock.
    Type: Grant
    Filed: April 26, 1999
    Date of Patent: June 19, 2001
    Inventor: Robert C. Warfel