Patents by Inventor Andrianus M. Kersten

Andrianus M. Kersten 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 CRT shielding cone having four metal plates extending from corners of smaller aperture to wall coating
    Patent number: 4198587
    Abstract: A color display tube having a magnetic screening cap provided with four resilient metal plates extending radially in the direction of the corner points of the display screen at the edge of the end of the cap having the smallest diameter. The plates press against the electrically conductive inner coating of the cone and which would otherwise prevent electrons pass between the screening cap and the conductive inner coating of the cone from impinging upon the display screen.
    Type: Grant
    Filed: October 20, 1978
    Date of Patent: April 15, 1980
    Assignee: U.S. Philips Corporation
    Inventors: Martinus C. M. Verhoeven, Andrianus M. Kersten, Giovanni Serio