Patents by Inventor Allen D. Preis

Allen D. Preis 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).

  • Low friction plastic track and extrusion process
    Patent number: 4470943
    Abstract: An elongated plastic track for use in a gravity feed display is extruded from a mixture of high impact polystyrene and dimethylpolysiloxane.
    Type: Grant
    Filed: July 5, 1983
    Date of Patent: September 11, 1984
    Assignee: The Mead Corporation
    Inventor: Allen D. Preis