Patents by Inventor Mathew D. Marhefka

Mathew D. Marhefka 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).

  • Compact disc holder
    Patent number: D391113
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: February 24, 1998
    Assignee: Computer Expressions Incorporated
    Inventor: Mathew D. Marhefka