Patents by Inventor Robert J. Hibbard

Robert J. Hibbard 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).

  • Parabolic reflector antenna
    Patent number: 4378561
    Abstract: A parabolic electromagnetic wave reflector is formed of glued together identical sectors of foam plastic, each with a parabolic curve formed by the upper side, and each with joint elements which serve also as stiffening ribs along their radial edges. A reflective surface is applied to the concave sides of the sectors. When the sectors are joined, they combine to form a parabolic dish.
    Type: Grant
    Filed: January 15, 1981
    Date of Patent: March 29, 1983
    Inventors: Robert J. Hibbard, Carl V. Seibert, III