Patents by Inventor Tomohisa Asano

Tomohisa Asano 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).

  • Cathode structure, and production method therefor and electron gun and cathode ray tube
    Publication number: 20030117054
    Abstract: To obtain a cathode electrode (a cathode structure) where the electron beam spot diameter or size is reduced, the cathode driving voltage is lowered and the cathode current is stabilized for a long period, a recess or a region which does not radiate electron beams is formed near the central portion or near the outer circumference portion of an electrode radiation substance 9 of a cathode electrode 1, and hollow electron beams are obtained related to a cathode electrode, its manufacturing method, an electron gun and a cathode-ray tube.
    Type: Application
    Filed: October 28, 2002
    Publication date: June 26, 2003
    Inventors: Makoto Maeda, Tomohisa Asano, Akihiro Kojima, Yoshinori Yamada, Tadakatsu Nakadaira
  • Luminated main lens member for an electron gun
    Patent number: 5661363
    Abstract: A main lens member for an electron gun comprises at least one high electrical resistance layer formed of a higher electrical resistance material sandwiched between low electrical layers which are laminated together to form a main line of an electron gun.
    Type: Grant
    Filed: July 12, 1995
    Date of Patent: August 26, 1997
    Assignee: Sony Corporation
    Inventors: Yukinobu Iguchi, Tsuneo Muchi, Tsunenari Saito, Tomohisa Asano