Patents by Inventor Hendrik J. De Wit, deceased

Hendrik J. De Wit, deceased 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).

  • Display device comprising a display tube having an external shield against the earth's magnetic field
    Patent number: 5912529
    Abstract: A display device comprising a display tube having a display screen with a pattern of phosphor elements. To reduce mislandings of electron beams, the display tube is accommodated within an external magnetic shield which is formed by one or more individual frames composed of bars of a magnetizable material and one or more excitable coils. The coils may be arranged, for example, alongside the frames.
    Type: Grant
    Filed: April 9, 1997
    Date of Patent: June 15, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Hendrik J. De Wit, deceased, Henricus J. Kunnen, legal representative