Patents by Inventor Constant J. M. Geenen

Constant J. M. Geenen 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).

  • Color display tube
    Patent number: 4614893
    Abstract: A color display tube of the "in-line" type includes a shadow mask having means for producing generally elliptical equitransmission factor curves.
    Type: Grant
    Filed: November 26, 1985
    Date of Patent: September 30, 1986
    Assignee: U.S. Philips Corporation
    Inventors: Constant J. M. Geenen, Leonardus A. M. Elshof
  • Method of optically projecting a pattern of substantially circular apertures on a photosensitive layer by rotating light source
    Patent number: 4152154
    Abstract: A window part for a color CRT is coated with a photosensitive layer which is exposed through the apertures of a shadow mask to a rotating light source having a direction of greatest light intensity directed to the center of rotation.
    Type: Grant
    Filed: July 19, 1977
    Date of Patent: May 1, 1979
    Assignee: U.S. Philips Corporation
    Inventors: Constant J. M. Geenen, Johannes C. A. Van Nes