Patents by Inventor Stephen J. Schoen

Stephen J. Schoen 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).

  • Three-dimensional jigsaw puzzle
    Patent number: 5178391
    Abstract: The present invention is directed to a three-dimensional jigsaw puzzle, which, when completed, produces a three-dimensional figure or form encased in a three-dimensional framing volume, such as a cube or other solid figure. The puzzle is cut into a number of horizontal slices, each of which is further broken into irregular jigsaw-like pieces.
    Type: Grant
    Filed: June 26, 1991
    Date of Patent: January 12, 1993
    Inventor: Stephen J. Schoen