Patents by Inventor Kees Tendeloo

Kees Tendeloo 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).

  • Method of manufacturing a color display tube and color display tube manufactured according to said method
    Patent number: 4220897
    Abstract: A ring is provided to correct the convergence, color purity and frame errors of a color display tube which ring is magnetized as a multipole and which is secured in or around the tube neck and around the paths of the electron beams.The magnetization of such a ring can best be carried out by energizing a magnetization unit with a combination of direct currents thereby generating a multipole magnetic field and then effecting the magnetization by generating a decaying alternating magnetic field which preferably varies its direction continuously.
    Type: Grant
    Filed: May 19, 1978
    Date of Patent: September 2, 1980
    Assignee: U.S. Philips Corporation
    Inventors: Piet G. J. Barten, Jan Gerritsen, Kees Tendeloo