Patents by Inventor Leonard J. Levin

Leonard J. Levin 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).

  • Information record with a thick overcoat
    Patent number: 4435801
    Abstract: The invention is an improved optical recording medium and a method for making same in which the substrate has a raised center and peripheral portions. The sides of the raised portions and the upper surface of a light absorptive layer, which overlies the unraised portion, form a mold which is filled with the overcoat material.
    Type: Grant
    Filed: March 31, 1982
    Date of Patent: March 6, 1984
    Assignee: RCA Corporation
    Inventor: Leonard J. Levin
  • Optical recording medium with a thick overcoat
    Patent number: 4340959
    Abstract: The invention is an improved optical recording medium and a method for making same in which the substrate has a raised center and peripheral portions. The sides of the raised portions and the upper surface of a light absorptive layer, which overlies the unraised portion, form a mold which is filled with the overcoat material.
    Type: Grant
    Filed: December 28, 1979
    Date of Patent: July 20, 1982
    Assignee: RCA Corporation
    Inventor: Leonard J. Levin