Patents by Inventor Fred G. Hedrick

Fred G. Hedrick 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).

  • Electromagnetic interfernce shielding filter
    Patent number: 5506047
    Abstract: A porous composite material made of porous electrically conductive materials coated with or laminated to porous hydrophobic or oleophobic materials. The porous composite material has excellent electromagnetic radiation shielding properties and resists passage of particles through it while permitting air or other gases to flow through it.
    Type: Grant
    Filed: July 13, 1993
    Date of Patent: April 9, 1996
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Fred G. Hedrick, Craig D. Lack