Patents by Inventor Harold T. Hahn

Harold T. Hahn 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).

  • Microwave absorbing material
    Patent number: H1002
    Abstract: A microwave absorbing material for the range 2500-6000 MHz is formed by using hollow carbon microspheres in the range of sizes between 90 and 350 microns outside diameter mixed unformly in a matrix of flexible silicone such that the microspheres are 27 to 34 percent by weight of the absorbing material. An important advantage of the present invention is the material contains no iron, is shock resistant, flexible and stable in thicknesses of 0.2 inches or greater.
    Type: Grant
    Filed: April 16, 1990
    Date of Patent: December 3, 1991
    Inventor: Harold T. Hahn