Patents by Inventor John Muka

John Muka 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).

  • Shredder
    Patent number: 4944462
    Abstract: A shredding device uses a plurality of interleaving, counter-rotating discs to reduce sheets of material into longitudinal strips. One or more notches, formed in the periphery of each disc, cut the longitudinal strips into segments. Deflectors disposed in the spaces between each disc clear unwanted material from between the discs. When jammed, the rotation of the discs reverses, and the notches bite into the jammed material to help remove it from between the discs.
    Type: Grant
    Filed: May 2, 1989
    Date of Patent: July 31, 1990
    Assignee: Cummins-Allison Corp.
    Inventors: Donald E. Raterman, John Muka