Patents by Inventor Katumi Muramatu

Katumi Muramatu 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 unit and projector apparatus
    Patent number: 8128240
    Abstract: An optical unit includes a frame; an optical member having a rectangular plate-shape; and a pair of mount portions formed in the frame, each holding a side of the optical member. Each of the mount portions includes an insertion slot into which an end of the optical member in the width direction is inserted. The insertion slot is formed between first and second walls of the frame. The first wall includes a thickness direction positioning surface that is in contact with one of the surfaces of the optical member in a thickness direction. The second wall includes an inclined surface. The optical member is fixed to the frame using an adhesive in a state in which the one of the surfaces of the optical member is pressed against the thickness direction positioning surface and an end of the optical member in the height direction is pressed against the inclined surface.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: March 6, 2012
    Assignee: Sony Corporation
    Inventors: Takashi Kubota, Katumi Muramatu
  • OPTICAL UNIT AND PROJECTOR APPARATUS
    Publication number: 20100073645
    Abstract: An optical unit includes a frame; an optical member having a rectangular plate-shape; and a pair of mount portions formed in the frame, each holding a side of the optical member. Each of the mount portions includes an insertion slot into which an end of the optical member in the width direction is inserted. The insertion slot is formed between first and second walls of the frame. The first wall includes a thickness direction positioning surface that is in contact with one of the surfaces of the optical member in a thickness direction. The second wall includes an inclined surface. The optical member is fixed to the frame using an adhesive in a state in which the one of the surfaces of the optical member is pressed against the thickness direction positioning surface and an end of the optical member in the height direction is pressed against the inclined surface.
    Type: Application
    Filed: December 1, 2009
    Publication date: March 25, 2010
    Inventors: Takashi KUBOTA, Katumi Muramatu