Patents by Inventor Keiichi Koyama

Keiichi Koyama 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: 8994485
    Abstract: A material containing a soft magnetic substance is subjected to a plastic deformation such as a roll processing to obtain a rod-shaped body. Then, the rod-shaped body or a shaped body obtained by processing the rod-shaped body into a shape other than a flat plate shape is subjected to a heat treatment in the presence of a magnetic field. The rod-shaped body or the shaped body is made magnetic-anisotropic by the heat treatment thereby to obtain a magnetic-anisotropic plastically deformed body.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: March 31, 2015
    Assignee: Keihin Corporation
    Inventors: Hidehiro Hoshina, Toshiro Harakawa, Keiichi Koyama, Kohki Takahashi
  • Publication number: 20130256574
    Abstract: A material containing a soft magnetic substance is subjected to a plastic deformation such as a roll processing to obtain a rod-shaped body. Then, the rod-shaped body or a shaped body obtained by processing the rod-shaped body into a shape other than a flat plate shape is subjected to a heat treatment in the presence of a magnetic field. The rod-shaped body or the shaped body is made magnetic-anisotropic by the heat treatment thereby to obtain a magnetic-anisotropic plastically deformed body.
    Type: Application
    Filed: March 15, 2013
    Publication date: October 3, 2013
    Applicant: KEIHIN CORPORATION
    Inventors: Hidehiro Hoshina, Toshiro Harakawa, Keiichi Koyama, Kohki Takahashi
  • Patent number: 7877552
    Abstract: A symmetric multiprocessing fault-tolerant computer system controls memory access in a symmetric multiprocessing computer system. To do so, virtual page structures are created, where the virtual page structures reflect physical page access privileges to shared memory for processors in a symmetric multiprocessing computer system. Access to shared memory is controlled based on physical page access privileges reflected in the virtual paging structures to coordinate deterministic shared memory access between processors in the symmetric multiprocessing computer system. A symmetric multiprocessing fault-tolerant computer system may use duplication or continuous replay.
    Type: Grant
    Filed: May 23, 2006
    Date of Patent: January 25, 2011
    Assignee: Marathon Technologies Corporation
    Inventors: Paul A. Leveille, Thomas D. Bissett, Stephen S. Corbin, Jerry Melnick, Glenn A. Tremblay, Satoshi Watanabe, Keiichi Koyama
  • Patent number: 7373545
    Abstract: A fault-tolerant computer system includes at least two servers, each of which is configured to perform a first set of operations. Each of the two servers communicate with a computer that does not perform the first set of operations. In the event of a failure of a component of the system, determining which of the servers will continue to perform the first set of operations based on communication with the computer.
    Type: Grant
    Filed: May 8, 2006
    Date of Patent: May 13, 2008
    Assignee: Marathon Technologies Corporation
    Inventors: Paul A. Leveille, Satoshi Watanabe, Keiichi Koyama
  • Publication number: 20080004083
    Abstract: A mobile information terminal includes a first case having an operation unit, a second case having a display unit and is partially overlapped on the first case, and a rotary connection mechanism for connecting the first and the second case in such a manner that the second case can be rotated relatively to the first case.
    Type: Application
    Filed: September 28, 2005
    Publication date: January 3, 2008
    Inventors: Kunihiro Ohki, Hidenori Takata, Keiichi Koyama, Ryohsuke Fukusada
  • Publication number: 20070214340
    Abstract: A symmetric multiprocessing fault-tolerant computer system controls memory access in a symmetric multiprocessing computer system. To do so, virtual page structures are created, where the virtual page structures reflect physical page access privileges to shared memory for processors in a symmetric multiprocessing computer system. Access to shared memory is controlled based on physical page access privileges reflected in the virtual paging structures to coordinate deterministic shared memory access between processors in the symmetric multiprocessing computer system. A symmetric multiprocessing fault-tolerant computer system may use duplication or continuous replay.
    Type: Application
    Filed: May 23, 2006
    Publication date: September 13, 2007
    Applicant: Marathon Technologies Corporation
    Inventors: Paul Leveille, Thomas Bissett, Stephen Corbin, Jerry Melnick, Glenn Tremblay, Satoshi Watanabe, Keiichi Koyama
  • Publication number: 20060253727
    Abstract: A fault-tolerant computer system includes at least two servers, each of which is configured to perform a first set of operations. Each of the two servers communicate with a computer that does not perform the first set of operations. In the event of a failure of a component of the system, determining which of the servers will continue to perform the first set of operations based on communication with the computer.
    Type: Application
    Filed: May 8, 2006
    Publication date: November 9, 2006
    Applicant: Marathon Technologies Corporation
    Inventors: Paul Leveille, Satoshi Watanabe, Keiichi Koyama
  • Patent number: D309626
    Type: Grant
    Filed: December 30, 1987
    Date of Patent: July 31, 1990
    Assignee: Sharp Corporation
    Inventors: Hiroshi Sakaguchi, Keiichi Koyama
  • Patent number: D310235
    Type: Grant
    Filed: December 19, 1988
    Date of Patent: August 28, 1990
    Assignee: Sharp Corporation
    Inventors: Hiroshi Sakaguchi, Keiichi Koyama
  • Patent number: D315358
    Type: Grant
    Filed: June 23, 1988
    Date of Patent: March 12, 1991
    Assignee: Sharp Corporation
    Inventors: Takahisa Yubisui, Hiroshi Sakaguchi, Keiichi Koyama
  • Patent number: D315572
    Type: Grant
    Filed: June 23, 1988
    Date of Patent: March 19, 1991
    Assignee: Sharp Corporation
    Inventors: Hiroshi Sakaguchi, Keiichi Koyama
  • Patent number: D317777
    Type: Grant
    Filed: June 14, 1988
    Date of Patent: June 25, 1991
    Assignee: Sharp Corporation
    Inventors: Hiroshi Sakaguchi, Keiichi Koyama
  • Patent number: D318064
    Type: Grant
    Filed: May 9, 1988
    Date of Patent: July 9, 1991
    Assignee: Sharp Corporation
    Inventors: Hiroshi Sakaguchi, Keiichi Koyama
  • Patent number: D351156
    Type: Grant
    Filed: July 8, 1993
    Date of Patent: October 4, 1994
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Seiji Usami, Yoshito Fujii, Keiichi Koyama
  • Patent number: D357245
    Type: Grant
    Filed: April 6, 1994
    Date of Patent: April 11, 1995
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Seiji Usami, Yoshito Fujii, Keiichi Koyama
  • Patent number: D369596
    Type: Grant
    Filed: May 10, 1995
    Date of Patent: May 7, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Osamu Akiyama, Yoshito Fujii, Kazuo Tsujimoto, Kazumi Osaka, Keiichi Koyama
  • Patent number: D371552
    Type: Grant
    Filed: May 10, 1995
    Date of Patent: July 9, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Osamu Akiyama, Yoshito Fujii, Kazuo Tsujimoto, Kazumi Osaka, Keiichi Koyama
  • Patent number: D373583
    Type: Grant
    Filed: May 10, 1995
    Date of Patent: September 10, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Osamu Akiyama, Yoshito Fujii, Keiichi Koyama, Kunihiro Ohki
  • Patent number: D413107
    Type: Grant
    Filed: November 13, 1998
    Date of Patent: August 24, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mitsuo Kawa, Keiichi Koyama
  • Patent number: D415757
    Type: Grant
    Filed: January 7, 1998
    Date of Patent: October 26, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shin Takahashi, Shigeru Kurozumi, Keiichi Koyama