Patents by Inventor Hidetoshi Yoshitaki

Hidetoshi Yoshitaki 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).

  • Information recording disk having a stepped central recess and hub configuration
    Patent number: 5504735
    Abstract: An information recording disk formed from two substrates with a stepped central opening for receiving a hub within the stepped recess of at least one of the substrates is provided. In one embodiment, the central aperture of the first substrate is larger than the central aperture of the second substrate to form the stepped recess. In another embodiment, at least one substrate has a stepped surface defining a central aperture and a hub structure is mounted within this stepped recess to reduce overall thickness of the disk.
    Type: Grant
    Filed: December 6, 1993
    Date of Patent: April 2, 1996
    Assignee: Seiko Epson Corporation
    Inventors: Tsutomu Ota, Mamoru Sugimoto, Yasuto Nose, Hidetoshi Yoshitaki, Tatsuro Higashi, Takashi Hayashi
  • Information recording disk
    Patent number: 5265086
    Abstract: An information recording disk formed from two substrates with a stepped central opening for receiving a hub within the stepped recess of at least one of the substrates is provided. In one embodiment, the central aperture of the first substrate is larger than the central aperture of the second substrate to form the stepped recess. In another embodiment, at least one substrate has a stepped surface defining a central aperture and a hub structure is mounted within this stepped recess to reduce overall thickness of the disk.
    Type: Grant
    Filed: July 29, 1992
    Date of Patent: November 23, 1993
    Assignee: Seiko Epson Corporation
    Inventors: Tsutomu Ota, Mamoru Sugimoto, Yasuto Nose, Hidetoshi Yoshitaki, Tatsuro Higashi, Takashi Hayashi
  • Photosensitive printing apparatus
    Patent number: 4866593
    Abstract: A printing apparatus for use in a printer with a photo-sensitive drum. The printing apparatus includes a spotlight source for generating a light provides essentially a point source. A photo-optical converter which is optically coupled to the spotlight source converts the light from the spotlight source to linear rays of light. A plurality of microshutters optically coupled to the photo-optical converter selectively transmits the light at selected portions of the array to the photo-sensitive drum. As a result, a light path is defined from the spot-light source through the photo-optical converter and the microshutters to the photo-sensitive drum.
    Type: Grant
    Filed: September 18, 1987
    Date of Patent: September 12, 1989
    Assignee: Seiko Epson Corporation
    Inventors: Teiji Miura, Toshihide Okamura, Nobumasa Abe, Masatoshi Yonekubo, Hidetoshi Yoshitaki, Hideo Yamazaki
  • Photosensitive printing apparatus
    Patent number: 4727380
    Abstract: A printing apparatus for use in a printer with a photo-sensitive drum. The printing apparatus includes a spotlight source for generating a light provides essentially a point source. A fiber-optical converter which is optically coupled to the spotlight source converts the light from the spotlight source to linear rays of light. A plurality of shutter window optically coupled to the fiber-optical converter selectively transmits the light at selected portions of the array to the photo-sensitive drum. As a result, a light path is defined from the spotlight source through the fiber-optical converter and the microshutters to the photo-sensitive drum.
    Type: Grant
    Filed: May 31, 1985
    Date of Patent: February 23, 1988
    Assignee: Seiko Epson Corporation
    Inventors: Teiji Miura, Toshihide Okamura, Nobumasa Abe, Masatoshi Yonekubo, Hidetoshi Yoshitaki, Hideo Yamazaki