Patents by Inventor Jon Holk

Jon Holk 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).

  • Cassette and an appurtenant apparatus having a screen for cyclical displaying of a plurality of pictures
    Patent number: 4949488
    Abstract: A display apparatus comprises a front stack of superimposed sheets which have cut lines and openings which form horizontally extending strips on the sheets. These strips are interleaved with similarly formed strips in a rear stack of sheets. In the interleaved position, upper portions of the front most sheets in the front and rear stacks are visible and are advantageously pictureless. To display a picture, one of the sheets in each of the front and rear stacks is lifted to expose their upper portions which carry segments of the same picture.
    Type: Grant
    Filed: August 8, 1988
    Date of Patent: August 21, 1990
    Inventor: Jon Holk