Patents by Inventor Charles R. Wilmarth

Charles R. Wilmarth 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).

  • Wire puzzle
    Patent number: 4524972
    Abstract: A wire-form puzzle which requires a puzzle solver to remove and replace a heart-shaped wire-form element from a captured position on a U-shaped wire-form having ring tips through which extend a rod also having ring tips, by threading the wire-form element about and through the ring tips.
    Type: Grant
    Filed: February 10, 1984
    Date of Patent: June 25, 1985
    Inventor: Charles R. Wilmarth