Patents by Inventor Philippe Roth

Philippe Roth 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).

  • Compensation circuit for the correction of image defects of a television image
    Patent number: 5113258
    Abstract: In a compensation circuit for the correction of image defects of an image projection system according to the control layer principle, in particular of an eidophor projector, a compensation signal is produced from signals associated with three adjacent lines, using an adder followed by a coefficient multiplier in order to produce a compensation signal. The amplitude of the compensation signal assumes a maximum value for low values of an intermediate image point in a single column image matrix of a video signal and a minimum value for high levels of the intermediate image point.
    Type: Grant
    Filed: April 9, 1990
    Date of Patent: May 12, 1992
    Assignee: Gretag Aktiengesellschaft
    Inventor: Philippe Roth
  • Watch case
    Patent number: D536628
    Type: Grant
    Filed: September 29, 2005
    Date of Patent: February 13, 2007
    Assignee: Tag Heuer SA
    Inventor: Philippe Roth