Patents by Inventor Andrew L. Demetropoulos

Andrew L. Demetropoulos 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).

  • Comfort military helmet liner
    Patent number: D577866
    Type: Grant
    Filed: August 12, 2004
    Date of Patent: September 30, 2008
    Inventors: William H. Frye, Andrew L. Demetropoulos, Carl L. Demetropoulos, Michael Tolin