Patents by Inventor Mitsuo Yotsutani

Mitsuo Yotsutani 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).

  • Disk drive and computer
    Patent number: 7076649
    Abstract: A microcomputer which is an integrated circuit including an electrically erasable and programmable nonvolatile semiconductor memory and a central processing unit is used for control of a disk drive. The nonvolatile semiconductor memory holds an application program such as a recorded information reproducing control program in an application program area, and holds a reboot program used for updating the application program in a reboot program area. The central processing unit executes the reboot program to rewrite the application program in whole or part, in response to a rewrite command for the application program which is supplied from the outside.
    Type: Grant
    Filed: January 28, 2004
    Date of Patent: July 11, 2006
    Assignees: Renesas Technology Corp., Hitachi ULSI Systems Co., Ltd.
    Inventors: Mitsuo Hagiwara, Hiromasa Takahashi, Satoshi Yamato, Nobuo Shibasaki, Mitsuo Yotsutani, Tsutomu Ishii
  • Disk drive and computer
    Publication number: 20040186952
    Abstract: A microcomputer (5) which is an integrated circuit including an electrically erasable and programmable nonvolatile semiconductor memory (56) and a central processing unit (51) is used for control of a disk drive (2). The nonvolatile semiconductor memory holds an application program such as a recorded information reproducing control program in an application program area (561), and holds a reboot program used for updating the application program in a reboot program area (560). The central processing unit executes the reboot program to rewrite the application program in whole or part, in response to a rewrite command for the application program which is supplied from the outside.
    Type: Application
    Filed: January 28, 2004
    Publication date: September 23, 2004
    Applicants: Hitachi, Ltd., Hitachi ULSI Systems Co., Ltd.
    Inventors: Mitsuo Hagiwara, Hiromasa Takahashi, Satoshi Yamato, Nobuo Shibasaki, Mitsuo Yotsutani, Tsutomu Ishii
  • Disk drive computer with programmable nonvolatile memory capable of rewriting a control program of the disk drive
    Patent number: 6393561
    Abstract: A microcomputer (5) which is an integrated circuit including an electrically erasable and programmable nonvolatile semiconductor memory (56) and a central processing unit (51) is used for control of a disk drive (2). The nonvolatile semiconductor memory holds an application program such as a recorded information reproducing control program in an application program area (561), and holds a reboot program used for updating the application program in a reboot program area (560). The central processing unit executes the reboot program to rewrite the application program in whole or part, in response to a rewrite command for the application program which is supplied from the outside.
    Type: Grant
    Filed: February 10, 1999
    Date of Patent: May 21, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Mitsuo Hagiwara, Hiromasa Takahashi, Satoshi Yamato, Nobuo Shibasaki, Mitsuo Yotsutani, Tsutomu Ishii
  • Disk drive and computer
    Publication number: 20020059515
    Abstract: A microcomputer (5) which is an integrated circuit including an electrically erasable and programmable nonvolatile semiconductor memory (56) and a central processing unit (51) is used for control of a disk drive (2). The nonvolatile semiconductor memory holds an application program such as a recorded information reproducing control program in an application program area (561), and holds a reboot program used for updating the application program in a reboot program area (560). The central processing unit executes the reboot program to rewrite the application program in whole or part, in response to a rewrite command for the application program which is supplied from the outside.
    Type: Application
    Filed: December 21, 2001
    Publication date: May 16, 2002
    Applicant: Hitachi, Ltd.
    Inventors: Mitsuo Hagiwara, Hiromasa Takahashi, Satoshi Yamato, Nobuo Shibasaki, Mitsuo Yotsutani, Tsutomu Ishii