Patents by Inventor Christopher P. Graham

Christopher P. Graham 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).

  • Protective mine clearance helmet
    Patent number: D397519
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: August 25, 1998
    Assignee: Med-Eng Systems Inc.
    Inventors: Vincent G. Crupi, Shaik M. Kalaam, Alan J. S. Stanish, Richard J. L'Abbe, Christopher P. Graham