Patents by Inventor Takeo Sawaguchi

Takeo Sawaguchi 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).

  • Patent number: 6693699
    Abstract: A method for repairing a liquid crystal display provided with a light transmitting member having an image display section. The method includes filling a filler, which has a refractive index substantially equal to that of the light transmitting member, into a scratch or scratches formed on inside and outside surfaces of the light transmitting member so as to repair the scratch or scratches.
    Type: Grant
    Filed: September 6, 2002
    Date of Patent: February 17, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Inoue, Shigenobu Maruyama, Toshio Asano, Susumu Aiuchi, Takeo Sawaguchi, Rokuro Watanabe
  • Patent number: 6552771
    Abstract: An image display device for repairing a scratch or scratches on a surface or surfaces of a light transmitting member having an image display section such an extent that the presence of the scratch or scratches cannot be visually perceived at at least in a bright view distance in all directions, and in which device a liquid filler having a refractive index equivalent to or on the same order of that of the light transmitting member is locally filled only into an area of the scratch or scratches, and the filler is cured. By controlling an amount of the filler so that a difference in level between a surface of the light transmitting member and a surface of the filler is at least ±5.0 &mgr;m or less and that an angle defined between a surface of the filler and a surface of the light transmitting member is at least 45 degrees or less or preferably at least 10 degrees or less, it is possible to exhibit display quality to such a degree that the presence of the scratch or scratches cannot be recognized.
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: April 22, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Inoue, Shigenobu Maruyama, Toshio Asano, Susumu Aiuchi, Takeo Sawaguchi, Rokuro Watanabe
  • Publication number: 20030002008
    Abstract: A method for repairing a liquid crystal display provided with a light transmitting member having an image display section. The method includes filling a filler, which has a refractive index substantially equal to that of the light transmitting member, into a scratch or scratches formed on inside and outside surfaces of the light transmitting member so as to repair the scratch or scratches.
    Type: Application
    Filed: September 6, 2002
    Publication date: January 2, 2003
    Inventors: Takashi Inoue, Shigenobu Maruyama, Toshio Asano, Susumu Aiuchi, Takeo Sawaguchi, Rokuro Watanabe
  • Patent number: 4457732
    Abstract: A method for fabrication of an image pickup tube face plate structure comprises adhering a transparent glass sheet material having a thickness of about 40 to 80 microns to a color separation stripe-shaped filter formed on a face plate of the tube, and forming an optically polished surface on a top of the glass sheet while reducing the distance between the top and the stripe filter surface to about 40 microns or less.
    Type: Grant
    Filed: March 23, 1981
    Date of Patent: July 3, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Saburo Nobutoki, Mitsuo Ichikawa, Takeo Sawaguchi