Patents by Inventor Leonard Pincus Fox

Leonard Pincus Fox 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).

  • Trapezoidal smooth grooves for video disc
    Patent number: 3968326
    Abstract: A method of forming a disc having an information recording groove of regular cross-sectional shape by forming a preliminary spiral groove of trapezoidal cross-section in a disc having a relatively flat surface, and then flowing an excess of viscous material on the groove surface of the disc while rotating the disc rapidly and long enough to flow off the excess viscous material so as to leave a continuous coating of viscous material over the surface of the disc, the trapezoidal regions being covered by a coating having a relatively constant radius of curvature.
    Type: Grant
    Filed: September 6, 1974
    Date of Patent: July 6, 1976
    Assignee: RCA Corporation
    Inventors: Richard William Nosker, Leonard Pincus Fox