Patents by Inventor Derrall W. Watkins

Derrall W. Watkins 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: 4907805
    Abstract: An improved ring puzzle game having a variable number of adjacent and overlapping rings held by closed loops contained on the top of posts inserted through apertures in a holding box, and an elongated, closed wand for passing through said rings. The object of the game is to remove and insert said wand from the rings and posts by a lengthy series of complex manipulations. Removable nuts are provided on the lower ends of the post so that the number of rings can be varied, thus varying the degree of difficulty of the puzzle. The holding box covers the sharp bottoms of the posts to prevent cutting of fingers or tearing clothing. In addition, the holding box also doubles as a storage box for loose rings, posts and game materials while the game is not in use.
    Type: Grant
    Filed: January 29, 1987
    Date of Patent: March 13, 1990
    Inventors: Derrall W. Watkins, Douglas W. Watkins