Patents by Inventor Jan Simon

Jan Simon 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).

  • Patent number: 3969573
    Abstract: An apparatus is described for reading a record carrier on which information is stored in an optically readable structure. Between a radiation source and an objective system, a polarization-sensitive beam splitter and a .lambda./4 plate are disposed. The optic axis of the .lambda./4 plate is perpendicular to the end faces, so that the plate may be thick and may be rotated in its own plane.
    Type: Grant
    Filed: April 29, 1974
    Date of Patent: July 13, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Gijsbertus Bouwhuis, Carel Arthur Jan Simons