Patents by Inventor Martinus M. Sens

Martinus M. Sens 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).

  • Laminated product, compound used in the laminated product and optical information carrier provided with the laminated product
    Patent number: 5045373
    Abstract: A laminated product comprising substrate (7) and a thin layer (11, 12) of a dielectric compound formed from the oxide or the suboxide of gallium antimonide or indium antimonide, an optical information carrier containing such a thin layer, whereby said thin layer, dependent upon the oxygen content, may function as a recording layer 11 or as a transparent distance layer 12, as well as the suboxide of gallium antimonide or indium antimonide used in the laminated product.
    Type: Grant
    Filed: February 14, 1990
    Date of Patent: September 3, 1991
    Assignee: U.S. Philips Corporation
    Inventors: Martinus M. Sens, Theodorus C. J. M. Bertens, Hendricus F. J. J. Van Tongeren, Johannes T. H. Thijssen
  • Optical recording element
    Patent number: 4731780
    Abstract: An optical recording element comprising an assembly of two parallel substrate plates made from a transparent synthetic resin and each comprising on their facing sides a recording layer which comprises a guide track in the form of a spiral-like groove, and a foil of sythetic resin which with both major surfaces engages or substantially engages the ridges of the recording layers present between the groove turns.
    Type: Grant
    Filed: January 21, 1987
    Date of Patent: March 15, 1988
    Assignee: U.S. Philips Corporation
    Inventors: Petrus J. Kivits, Martinus M. Sens, Rene Dufour