Patents by Inventor Werner Heher

Werner Heher 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: 4874085
    Abstract: High storage density information carriers, particularly optically readable video discs and digital records, can only be read error-free by a playback device when the high requirements made of freedom from warping also remain guaranteed over long storage times. A cassette is provided to support and fix an information carrier only within its central portion which is free of information tracks and, by a sufficient spacing of the information carrier in the support-free area between a bottom portion and a cover portion contact with the information carrier in this area is avoided, even given consideration of maximally-admissible warping tolerances of the storage cassette and of the information carrier.
    Type: Grant
    Filed: October 18, 1988
    Date of Patent: October 17, 1989
    Assignee: Polygram GmbH
    Inventors: Hermann Grobecker, Werner Heher, Adelbert Zielasek, Frederik B. Nusselder