Patents by Inventor William C. Von Hagen

William C. Von Hagen 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).

  • Sequencing puzzle
    Patent number: 5074794
    Abstract: A puzzle for teaching the sequence of a series of elements as number or letters. The elements, in their characteristic outline shapes, are fitted overlapping in sequence into correspondingly shaped pockets in a board. A following element, seated before the next preceding element, blocks the preceding element from being seated.
    Type: Grant
    Filed: October 26, 1990
    Date of Patent: December 24, 1991
    Inventor: William C. Von Hagen