Patents by Inventor Tamotsu Kozuka

Tamotsu Kozuka 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).

  • STORAGE DEVICE
    Publication number: 20190079697
    Abstract: A storage device includes a command reception unit and a control unit. The command reception unit is configured for communication with a host device to receive a command from the host device, and transmit a completion report to the host device upon completion of processing requested in the command. The control unit is configured to determine a threshold amount of time to wait after the command reception unit receives the command before causing the command reception unit to transmit the completion report, and to cause the command reception unit to transmit the completion report after waiting a period of time after completion of the processing, if the processing completes before the threshold amount of time has elapsed since reception of the command.
    Type: Application
    Filed: February 23, 2018
    Publication date: March 14, 2019
    Inventors: Satoru SUZUKI, Tamotsu KOZUKA, Kaoru ABIKO
  • Method of and apparatus for controlling magnetic disc drive
    Patent number: 5956200
    Abstract: Disclosed are a method of and an apparatus for controlling a magnetic disc drive including a magnetic head in which a write head and a read head are separated. The control method comprises: a step of calculating a moving quantity up to a designated target track position in accordance with a write instruction or a read instruction and calculating a moving quantity from the moving quantity up to the target track position and a yaw angle offset quantity in accordance with the read instruction or the write instruction; and a step of locating the magnetic head in the target track position by seek-controlling the rotary type actuator in accordance with the calculated moving quantity.
    Type: Grant
    Filed: March 1, 1996
    Date of Patent: September 21, 1999
    Assignee: Fujitsu Limited
    Inventors: Keiichi Kohno, Tsuyoshi Takahashi, Masayoshi Ishii, Yoshiyuki Nagasaka, Tamotsu Kozuka, Susumu Yoshida
  • Method and apparatus for supplying optimal bias current to a magnetic head
    Patent number: 5831782
    Abstract: Disclosed are a method of and an apparatus for controlling a magnetic disc drive including a magnetic head in which a write head and a read head are separated. The control method comprises: a step of calculating a moving quantity up to a designated target track position in accordance with a write instruction or a read instruction and calculating a moving quantity from the moving quantity up to the target track position and a yaw angle offset quantity in accordance with the read instruction or the write instruction; and a step of locating the magnetic head in the target track position by seek-controlling the rotary type actuator in accordance with the calculated moving quantity.
    Type: Grant
    Filed: August 19, 1996
    Date of Patent: November 3, 1998
    Assignee: Fujitsu Limited
    Inventors: Keiichi Kohno, Tsuyoshi Takahashi, Masayoshi Ishii, Yoshiyuki Nagasaka, Tamotsu Kozuka, Susumu Yoshida