Patents by Inventor Keietsu Sato

Keietsu Sato 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).

  • Optical device and projection-type image display apparatus
    Patent number: 8511831
    Abstract: An optical device includes a main body having a light incident surface, a light emitting surface provided facing the light incident surface, and a light-reflecting side surface provided from a periphery of the light incident surface to a periphery of the light emitting surface. In the optical device, the light incident surface, the light emitting surface and the light-reflecting side surface are mirror-finished, and a supporting portion configured to support the main body is provided on the light-reflecting side surface.
    Type: Grant
    Filed: April 10, 2007
    Date of Patent: August 20, 2013
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Takashi Ikeda, Yoshihiro Yokote, Shinya Matsumoto, Keietsu Sato, Kazutaka Tomite
  • Optical device and projection-type image display apparatus
    Publication number: 20070258058
    Abstract: An optical device includes a main body having a light incident surface, a light emitting surface provided facing the light incident surface, and a light-reflecting side surface provided from a periphery of the light incident surface to a periphery of the light emitting surface. In the optical device, the light incident surface, the light emitting surface and the light-reflecting side surface are mirror-finished, and a supporting portion configured to support the main body is provided on the light-reflecting side surface.
    Type: Application
    Filed: April 10, 2007
    Publication date: November 8, 2007
    Applicants: SANYO ELECTRIC CO., LTD., RICOH OPTICAL INDUSTRIES CO., LTD
    Inventors: Takashi Ikeda, Yoshihiro Yokote, Shinya Matsumoto, Keietsu Sato, Kazutaka Tomite