Patents by Inventor Kouji Shibusa

Kouji Shibusa 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, cathode ray tube, and image display apparatus
    Publication number: 20040104662
    Abstract: The present invention achieves a screen of high luminance with an excellent focus characteristic.
    Type: Application
    Filed: October 17, 2003
    Publication date: June 3, 2004
    Inventors: Hirofumi Nakamura, Hideki Miyazaki, Masatoki Morimoto, Kouji Shibusa, Toshinori Suzuki
  • Electron gun, cathode ray tube and image display device
    Publication number: 20020021075
    Abstract: To provide an electron gun that can improve the focus characteristics of a cathode ray tube by reducing the working area of the cathode, a cathode ray tube equipped with this electron gun that has favorable focus characteristics, and an image display device comprising this cathode ray tube that can achieve favorable images. An area on the electron emission surface of the cathode K that meets the beam hole (11A) of the first grid (11) forms an electron gun in closest proximity to the first grid (11). Provide a cathode ray tube equipped with this electron gun and further provide an image display device formed by this cathode raytube.
    Type: Application
    Filed: June 21, 2001
    Publication date: February 21, 2002
    Inventors: Hirofumi Nakamura, Hideki Miyazaki, Keizo Mori, Kouji Shibusa