Patents by Inventor Yuzuru Kobori

Yuzuru Kobori 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).

  • Electron gun with low spherical aberration
    Patent number: 4649318
    Abstract: An electron gun of uni-potential type is disclosed, which includes a main electron lens system consisting of a front electron lens system formed of a third grid and a fourth grid and a rear electron lens system formed of the fourth grid and a fifth grid of which the electron lens action regions are separated from each other. In this case, the electron lens diameter of the front electron lens system is selected smaller than that of the rear electron lens system, and the aperture diameter of the fifth grid in the rear electron lens system is selected larger than that of the fourth grid, and may be nearly as large as the inner diameter of the tube in which it is placed for use.
    Type: Grant
    Filed: September 23, 1985
    Date of Patent: March 10, 1987
    Assignee: Sony Corporation
    Inventors: Masahiro Kikuchi, Yuzuru Kobori, Kanemitsu Murakami
  • Cathode ray tube apparatus
    Patent number: 4345185
    Abstract: A cathode ray tube apparatus in which a discharge current suppressing means is inserted into the discharge current flowing path between the final electrode of the electron gun of a cathode ray tube and the stem pin thereof within the cathode ray tube.
    Type: Grant
    Filed: June 10, 1980
    Date of Patent: August 17, 1982
    Assignee: Sony Corporation
    Inventor: Yuzuru Kobori