Patents by Inventor Wilhelmus M. M. Van Der Steen

Wilhelmus M. M. Van Der Steen 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 with vibration damping in a supporting frame connected to a shadow mask
    Patent number: 5315208
    Abstract: In a color display tube a shadow mask skirt is welded to a frame at least near the ends of two oppositely located sides of the frame, and engages the ends of the other two sides of the frame in a fractional manner.
    Type: Grant
    Filed: February 14, 1989
    Date of Patent: May 24, 1994
    Assignee: U.S. Philips Corporation
    Inventors: Antonius J. J. M. van der Bolt, Wilhelmus M. M. van der Steen, Martinus C. M. Verhoeven
  • Colour display tube with shadow mask less sensitive to microphonics
    Patent number: 5103132
    Abstract: A colour picture tube in which a shadow mask is attached to a frame which consists of two short sides and two long sides connected with angular elements. The ends of the short sides of the frame are connected to the angular elements in a way to leave the sides of the frame extending free from the angular elements. The skirt of the shadow mask bears against this free portion. As a result, the shadow mask 10 is less sensitive to vibrations.
    Type: Grant
    Filed: November 29, 1990
    Date of Patent: April 7, 1992
    Assignee: U.S. Philips Corporation
    Inventors: Antonius J. J. M. Van Der Bolt, Wilhelmus M. M. Van Der Steen, Jan P. Meijer