Patents by Inventor Masakazu KITAHARA

Masakazu KITAHARA 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: 9512498
    Abstract: A process for producing spheroidal graphite cast iron includes a spheroidization treatment, an inoculant treatment and a pouring inoculation treatment. A molten iron is subjected to the spheroidization treatment using a spheroidizing agent of an Fe—Si—Mg—Ca-based alloy which contains a given amount of Ba and contains substantially no rare-earth element.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: December 6, 2016
    Assignee: AKEBONO BRAKE INDUSTRY CO., LTD.
    Inventors: Tsukasa Baba, Takao Horiya, Takuya Tokiyama, Takashi Sato, Hiroshi Idei, Yutaka Nishikawa, Masakazu Kitahara, Hidekazu Narita
  • Publication number: 20160253111
    Abstract: According to one embodiment, a storage device is provided which includes a control unit configured to, in case that first data coincides with third data out of second data of a second size greater than the first size stored on a storage medium, do not write fourth data obtained by replacing the third data included in the second data with the first data onto the storage medium.
    Type: Application
    Filed: June 16, 2015
    Publication date: September 1, 2016
    Inventors: Minoru Yamamoto, Masakazu Kitahara, Kiyotaka Sasaki, Seiji Inamura
  • Publication number: 20150234607
    Abstract: According to one embodiment, a disk drive includes a data-save control unit configured to, when a decrease of power is detected, save data in a volatile memory to a non-volatile memory using a backup power source. The disk drive further includes a command processing unit configured to, when new data is stored in the volatile memory, when a data amount of unsaved data, which has not been saved in a disk media memory, exceeds a backup data amount that can be saved from the volatile memory to the non-volatile memory, save the unsaved data to the disk media memory.
    Type: Application
    Filed: June 25, 2014
    Publication date: August 20, 2015
    Inventors: Michihiko Umeda, Masakazu Kitahara, Seiji Toda, Yuusuke Izumizawa, Nobuhiro Sugawara
  • Patent number: 9070417
    Abstract: According to one embodiment, a controller of a magnetic disk device starts to receive first data specified in a first write command from a host, and starts to write the first data to a disk in accordance with the first write command. The controller reports a status for execution of the first write command to the host depending on whether or not a second capacity of data not yet written to the disk is less than or equal to a first capacity of a first free space in a nonvolatile cache. The first free space is available to save data during a first period when a backup power supply enables power to be supplied. The second capacity decreases as writing of the first data to the disk progresses.
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: June 30, 2015
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yasuyuki Nagashima, Masakazu Kitahara, Kiyotaka Sasaki, Michihiko Umeda
  • Publication number: 20140348694
    Abstract: A process for producing spheroidal graphite cast iron includes a spheroidization treatment, an inoculant treatment and a pouring inoculation treatment. A molten iron is subjected to the spheroidization treatment using a spheroidizing agent of an Fe—Si—Mg—Ca-based alloy which contains a given amount of Ba and contains substantially no rare-earth element.
    Type: Application
    Filed: December 19, 2012
    Publication date: November 27, 2014
    Inventors: Tsukasa Baba, Takao Horiya, Takuya Tokiyama, Takashi Sato, Hiroshi Idei, Yutaka Nishikawa, Masakazu Kitahara, Hidekazu Narita
  • Patent number: 8879181
    Abstract: According to one embodiment, a read/write apparatus includes a receiver and a refresh module. The receiver receives a write command requesting a write to a magnetic disk. The refresh module refreshes, when a first area of the magnetic disk includes a second area corresponding to the write command, data written in a third area, the third area being an area obtained by excluding the second area from the first area.
    Type: Grant
    Filed: January 7, 2013
    Date of Patent: November 4, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Seiji Toda, Michio Yamamoto, Masakazu Kitahara, Masataka Shitara, Takumi Kakuya, Kiyotaka Sasaki, Isao Fujita, Satoru Adachi, Kenji Inoue, Nobuhiro Sugawara, Hironori Kanno
  • Publication number: 20140071559
    Abstract: According to one embodiment, a read/write apparatus includes a receiver and a refresh module. The receiver receives a write command requesting a write to a magnetic disk. The refresh module refreshes, when a first area of the magnetic disk includes a second area corresponding to the write command, data written in a third area, the third area being an area obtained by excluding the second area from the first area.
    Type: Application
    Filed: January 7, 2013
    Publication date: March 13, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Seiji TODA, Michio YAMAMOTO, Masakazu KITAHARA, Masataka SHITARA, Takumi KAKUYA, Kiyotaka SASAKI, Isao FUJITA, Satoru ADACHI, Kenji INOUE, Nobuhiro SUGAWARA, Hironori KANNO
  • Publication number: 20130194696
    Abstract: According to one embodiment, a disk drive writes, upon receiving a first write data block in a plurality of write data blocks having continuous logical block addresses, the first write data block in a first storage location which is included in a specific area on a disk and is adjacent to a position of the head, and writes a second write data block in a second storage location which is included in the specific area and is adjacent to the position of the head. The second storage location is a storage location skipped from the first storage location by an interval corresponding to a difference between a write completion timing of the first write data block and a reception timing of the second write data block.
    Type: Application
    Filed: May 16, 2012
    Publication date: August 1, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Masakazu KITAHARA, Minoru YAMAMOTO