Patents by Inventor Michael J. Spak

Michael J. Spak 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: D313044
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: December 18, 1990
    Inventor: Michael J. Spak