Patents by Inventor Kaoru Iseri

Kaoru Iseri 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).

  • Data storage device and data storage device control method
    Patent number: 7333282
    Abstract: Embodiments of the invention avoid an off-track write when an impact is applied. A hard disk drive according to one embodiment of the present invention comprises a magnetic disk; an actuator for moving a head element section over the magnetic disk; and an HDC/MPU for prohibiting the head element section from writing onto the magnetic disk for a short period when a detected impact is found to be greater than a low reference level and not greater than a high reference level, and prohibiting the head element section from writing onto the magnetic disk for a period longer than the short period when the detected impact is found to be greater than the high reference level.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: February 19, 2008
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Kaoru Iseri, Atsushi Tobari, Yasuhiro Iihara, Masanori Aratani
  • Data storage device and data storage device control method
    Publication number: 20060139790
    Abstract: Embodiments of the invention avoid an off-track write when an impact is applied. A hard disk drive according to one embodiment of the present invention comprises a magnetic disk; an actuator for moving a head element section over the magnetic disk; and an HDC/MPU for prohibiting the head element section from writing onto the magnetic disk for a short period when a detected impact is found to be greater than a low reference level and not greater than a high reference level, and prohibiting the head element section from writing onto the magnetic disk for a period longer than the short period when the detected impact is found to be greater than the high reference level.
    Type: Application
    Filed: December 22, 2005
    Publication date: June 29, 2006
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Kaoru Iseri, Atsushi Tobari, Yasuhiro Iihara, Masanori Aratani
  • Servo information write method, servo control method, data storage device, and program
    Patent number: 7019933
    Abstract: A servo system wherein a read head R detects a servo pattern that is written on a magnetic disk by a write head W. Position control of the write head W is exercised in accordance with the detected servo pattern, and the read head R detects a propagation pattern that is written on the magnetic disk by the write head W. Position of the write head W is corrected in accordance with the detected propagation pattern.
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: March 28, 2006
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Kaoru Iseri, Takashi Kuroda, Nobuya Matsubara, Kenji Ogasawara, Fuminori Sai, Hiroshi Yanagisawa
  • Servo information write method, servo control method, data storage device, and program
    Publication number: 20040125491
    Abstract: A servo system wherein a read head R detects a servo pattern that is written on a magnetic disk by a write head W. Position control of the write head W is exercised in accordance with the detected servo pattern, and the read head R detects a propagation pattern that is written on the magnetic disk by the write head W. Position of the write head W is corrected in accordance with the detected propagation pattern.
    Type: Application
    Filed: September 30, 2003
    Publication date: July 1, 2004
    Applicant: Hitachi Global Storage Technologies
    Inventors: Kaoru Iseri, Takashi Kuroda, Nobuya Matsubara, Kenji Ogasawara, Fuminori Sai, Hiroshi Yanagisawa