Patents by Inventor Hideki Nagata

Hideki Nagata 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).

  • Glass composition for crystallized glass
    Patent number: 6649549
    Abstract: A polished glass disk medium substrate suitable for use as a substrate for a hard disk, a hard disk containing the substrate and methods for making the substrate. The substrate containing glass forming raw materials may be formed so as to have a Young's modulus of 110 or higher.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: November 18, 2003
    Assignee: Minolta Co., Ltd.
    Inventors: Hideki Nagata, Hiroshi Yuki, Toshiharu Mori, Hideki Kawai, Kazuhiko Ishimaru
  • Glass composition for crystallized glass
    Patent number: 6645892
    Abstract: A polished glass disk medium substrate suitable for use as a substrate for a hard disk, a hard disk containing the substrate and methods for making the substrate. The substrate containing glass forming raw materials may be formed so as to have a Young's modulus of 110 or higher.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: November 11, 2003
    Assignee: Minolta Co., Ltd.
    Inventors: Hideki Nagata, Hiroshi Yuki, Toshiharu Mori, Hideki Kawai, Kazuhiko Ishimaru
  • Glass composition for crystallized glass
    Patent number: 6645889
    Abstract: A polished glass disk medium substrate suitable for use as a substrate for a hard disk, a hard disk containing the substrate and methods for making the substrate. The substrate containing glass forming raw materials may be formed so as to have a Young's modulus of 110 or higher.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: November 11, 2003
    Assignee: Minolta Co., Ltd.
    Inventors: Hideki Nagata, Hiroshi Yuki, Toshiharu Mori, Hideki Kawai, Kazuhiko Ishimaru
  • Glass composition for crystallized glass
    Patent number: 6645891
    Abstract: A polished glass disk medium substrate suitable for use as a substrate for a hard disk, a hard disk containing the substrate and methods for making the substrate. The substrate containing glass forming raw materials may be formed so as to have a Young's modulus of 110 or higher.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: November 11, 2003
    Assignee: Minolta Co., Ltd.
    Inventors: Hideki Nagata, Hiroshi Yuki, Toshiharu Mori, Hideki Kawai, Kazuhiko Ishimaru
  • Glass composition for crystallized glass
    Patent number: 6645888
    Abstract: A polished glass disk medium substrate suitable for use as a substrate for a hard disk, a hard disk containing the substrate and methods for making the substrate. The substrate containing glass forming raw materials may be formed so as to have a Young's modulus of 110 or higher.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: November 11, 2003
    Assignee: Minolta Co., Ltd.
    Inventors: Hideki Nagata, Hiroshi Yuki, Toshiharu Mori, Hideki Kawai, Kazuhiko Ishimaru
  • Glass composition for crystallized glass
    Patent number: 6645890
    Abstract: A polished glass disk medium substrate suitable for use as a substrate for a hard disk, a hard disk containing the substrate and methods for making the substrate. The substrate containing glass forming raw materials may be formed so as to have a Young's modulus of 110 or higher.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: November 11, 2003
    Assignee: Minolta Co., Ltd.
    Inventors: Hideki Nagata, Hiroshi Yuki, Toshiharu Mori, Hideki Kawai, Kazuhiko Ishimaru
  • Glass composition for crystallized glass
    Patent number: 6642162
    Abstract: A polished glass disk medium substrate suitable for use as a substrate for a hard disk, a hard disk containing the substrate and methods for making the substrate. The substrate containing glass forming raw materials may be formed so as to have a Young's modulus of 110 or higher.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: November 4, 2003
    Assignee: Minolta Co., Ltd.
    Inventors: Hideki Nagata, Hiroshi Yuki, Toshiharu Mori, Hideki Kawai, Kazuhiko Ishimaru
  • Glass composition for crystallized glass
    Patent number: 6642161
    Abstract: A polished glass disk medium substrate suitable for use as a substrate for a hard disk, a hard disk containing the substrate and methods for making the substrate. The substrate containing glass forming raw materials may be formed so as to have a Young's modulus of 110 or higher.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: November 4, 2003
    Assignee: Minolta Co., Ltd.
    Inventors: Hideki Nagata, Hiroshi Yuki, Toshiharu Mori, Hideki Kawai, Kazuhiko Ishimaru
  • Glass composition for crystallized glass
    Patent number: 6635591
    Abstract: A polished glass disk medium substrate suitable for use as a substrate for a hard disk, a hard disk containing the substrate and methods for making the substrate. The substrate containing glass forming raw materials may be formed so as to have a Young's modulus of 110 or higher.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: October 21, 2003
    Assignee: Minolta Co., Ltd.
    Inventors: Hideki Nagata, Hiroshi Yuki, Toshiharu Mori, Hideki Kawai, Kazuhiko Ishimaru
  • Glass-ceramic composition for recording disk substrate
    Patent number: 6627567
    Abstract: A glass ceramics composition for recording disk substrate contains, essentially, expressed in terms of weight percent on the oxide basis, from 35 to 60 wt % of SiO2, from 10 to 30 wt % of Al2O3, from 10 to 30 wt % of MgO and from 0.1 to 1.8 wt % of P2O5.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: September 30, 2003
    Assignee: Minolta Co., Ltd.
    Inventors: Hideki Nagata, Toshiharu Mori, Hiroshi Yuki, Hideki Kawai, Akira Sugimoto, Kazuhiko Ishimaru
  • Communication device having an image transmission function
    Patent number: 6628320
    Abstract: A communication device having an image transmission function such as a video phone or a camera-equipped cellular phone. The image transmission function is capable of capturing an object image using an optimal size.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: September 30, 2003
    Assignee: Minolta Co., Ltd.
    Inventors: Hiromu Mukai, Hitoshi Hagimori, Minoru Kuwana, Tsutomu Honda, Kazuhiko Ishimaru, Hideki Nagata
  • Objective lens system for optical pickups
    Patent number: 6624951
    Abstract: An objective lens system for optical pickups performing at least one of reading and writing of information by condensing a luminous flux from a light source on an information recording medium, has the following two lens elements from a light source side: a first lens element having a first surface convex to the light source side and a second surface convex to the light source side; and a second lens element having a third surface convex to the light source side and a plane fourth surface, wherein the first surface is an aspherical surface.
    Type: Grant
    Filed: June 5, 2002
    Date of Patent: September 23, 2003
    Assignee: Minolta Co., Ltd.
    Inventors: Junji Hashimura, Kyu Takada, Hideki Nagata
  • Display optical apparatus having a rotary compensator to improve display contrast
    Patent number: 6624862
    Abstract: A display optical apparatus is provided with: a polarizing plate transmitting illuminating light having a predetermined polarization direction; a reflective liquid crystal display device reflecting the illuminating light transmitted by the polarizing plate as projected light of a polarization condition that differs according to pixel information for each pixel; and a phase plate changing the polarization conditions of the illuminating light and the projected light and directing the illuminating light and the projected light to the polarizing plate. The phase plate is disposed between the reflective liquid crystal display device and the polarizing plate. The black level of the projected light is adjusted by rotating the principal axis direction of the phase plate.
    Type: Grant
    Filed: March 28, 2000
    Date of Patent: September 23, 2003
    Assignee: Minolta Co., Ltd.
    Inventors: Kohtaro Hayashi, Kenji Konno, Yasumasa Sawai, Nobuyuki Kobayashi, Kenji Nishiguchi, Hideki Nagata
  • Glass-ceramic composition for recording disk substrate
    Patent number: 6624101
    Abstract: A glass ceramics composition for recording disk substrate contains, essentially, expressed in terms of weight percent on the oxide basis, from 51 to 57.5 wt % of SiO2, from 10 to 30 wt % of Al2O3, from 10 to 30 wt % of MgO, and from 0.1 to 6.8 wt % of TiO2.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: September 23, 2003
    Assignee: Minolta Co., Ltd.
    Inventors: Hideki Nagata, Toshiharu Mori, Hiroshi Yuki, Hideki Kawai, Akira Sugimoto, Kazuhiko Ishimaru
  • Glass-ceramic composition for recording disk substrate
    Patent number: 6610620
    Abstract: A glass ceramics composition for recording disk substrate contains, essentially, expressed in terms of weight percent on the oxide basis, from 48 to 54.8 wt % of SiO2, from 10 to 30 wt % of Al2O3, from 10 to 30 wt % of MgO, and from 2.4 to 10 wt % of Li2O.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: August 26, 2003
    Assignee: Minolta Co., Ltd.
    Inventors: Hideki Nagata, Toshiharu Mori, Hiroshi Yuki, Hideki Kawai, Akira Sugimoto, Kazuhiko Ishimaru
  • Image reproducing apparatus and image control method
    Patent number: 6606451
    Abstract: An image reproducing apparatus reproduces a still picture recorded on a silver-halide film and a moving picture recorded on a video tape. The image reproducing apparatus also reproduces simultaneous shooting information recorded on both the film and the video tape. The image reproducing apparatus has a controller which controls reproduction of the pictures recorded on the film and the video tape in accordance with the simultaneous shooting information.
    Type: Grant
    Filed: February 10, 1998
    Date of Patent: August 12, 2003
    Assignee: Minolta Co., Ltd.
    Inventors: Tsutomu Honda, Hideki Nagata, Tougo Teramoto
  • Glass-ceramic composition for recording disk substrate
    Patent number: 6596659
    Abstract: A glass ceramics composition for recording disk substrate contains, essentially, expressed in terms of weight percent on the oxide basis, from 35 to 50 wt % of SiO2, from 10 to 30 wt % of Al2O3, from 10 to 30 wt % of MgO, and from 2.6 to 8 wt % of Li2O.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: July 22, 2003
    Assignee: Minolta Co., Ltd.
    Inventors: Hideki Nagata, Toshiharu Mori, Hiroshi Yuki, Hideki Kawai, Akira Sugimoto, Kazuhiko Ishimaru
  • Glass-ceramic composition for recording disk substrate
    Patent number: 6593259
    Abstract: A glass ceramics composition for recording disk substrate contains, essentially, expressed in terms of weight percent on the oxide basis, from 54.5 to 59.5 wt % of SiO2, from 10 to 30 wt % of Al2O3, from 10 to 30 wt % of MgO, and from 3 to 12 wt % of Li2O.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: July 15, 2003
    Assignee: Minolta Co., Ltd.
    Inventors: Hideki Nagata, Toshiharu Mori, Hiroshi Yuki, Hideki Kawai, Akira Sugimoto, Kazuhiko Ishimaru
  • Glass-ceramic composition for recording disk substrate
    Patent number: 6593257
    Abstract: A glass ceramics composition for recording disk substrate consists essentially, expressed in terms of weight percent on the oxide basis, of from 65 to 80 wt % of SiO2, from 3 to 15 wt % of Al2O3, from 3 to 15 wt % of Li2O, from 0.2 to 5 wt % of P2O5, and from 0.1 to 15 wt % of ZrO2, wherein a value of ZrO2/P2O5 is within a range from 1.1 to 8.5, expressed in terms of weight percent on the oxide basis.
    Type: Grant
    Filed: July 5, 2000
    Date of Patent: July 15, 2003
    Assignee: Minolta Co., Ltd.
    Inventors: Hideki Nagata, Hideki Kawai, Toshiharu Mori, Hiroshi Yuki, Kazuhiko Ishimaru
  • Glass-ceramic composition for recording disk substrate
    Publication number: 20030125183
    Abstract: A glass ceramics composition for recording disk substrate consists essentially, expressed in terms of weight percent on the oxide basis, of from 65 to 80 wt % of SiO2, from 3 to 15 wt % of Al2O3, from 3 to 15 wt % of Li2O, from 0.2 to 5 wt % of P2O5, and from 0.1 to 0.8 wt % of ZrO2.
    Type: Application
    Filed: December 4, 2002
    Publication date: July 3, 2003
    Inventors: Hideki Nagata, Hideki Kawai, Toshiharu Mori, Hiroshi Yuki, Kazuhiko Ishimaru