Patents by Inventor Kemmei Masuda

Kemmei Masuda 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).

  • Magnetic recording and reproducing apparatus
    Publication number: 20070019334
    Abstract: Magnetic recording and reproducing apparatuses are narrowed in track pitch as one method of increasing the respective recording capacities. It has become evident, however, that the shocks and/or vibration applied during operation has critical effects on recording/reproduction, and it has thus become essential to improve shock resistance and vibration resistance. In a rotating magnetic head drum device including a lower fixed drum, an upper fixed drum, and a magnetic head, the upper face of the upper fixed drum and a cassette holder face are secured using a vibration suppressor plate to improve shock resistance and vibration resistance.
    Type: Application
    Filed: May 1, 2006
    Publication date: January 25, 2007
    Inventors: Akihisa Obata, Masami Takada, Yoshio Uemura, Yoshiharu Yamashita, Kemmei Masuda
  • Recording/reproducing apparatus
    Patent number: 7023635
    Abstract: A recording/reproducing apparatus capable of switching over among a plurality of heads with high precision, wherein the apparatus is provided with: a recording/reproducing unit for recording/reproducing signals onto/from a recording medium with a plurality of heads; a generating unit for generating control data for controlling the recording/reproducing unit; and a transmitting unit for transmitting control data generated by the generating unit to the recording/reproducing unit, wherein priority is given in transmission to data for controlling the switching of the plurality of heads over other data.
    Type: Grant
    Filed: March 15, 2004
    Date of Patent: April 4, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Shigeru Yamazaki, Kemmei Masuda, Toshio Tsuchiya
  • Recording/reproducing apparatus
    Publication number: 20040169952
    Abstract: A recording/reproducing apparatus capable of switching over among a plurality of heads with high precision, wherein the apparatus is provided with: a recording/reproducing unit for recording/reproducing signals onto/from a recording medium with a plurality of heads; a generating unit for generating control data for controlling the recording/reproducing unit; and a transmitting unit for transmitting control data generated by the generating unit to the recording/reproducing unit, wherein priority is given in transmission to data for controlling the switching of the plurality of heads over other data.
    Type: Application
    Filed: March 15, 2004
    Publication date: September 2, 2004
    Applicant: HITACHI, LTD.
    Inventors: Shigeru Yamazaki, Kemmei Masuda, Toshio Tsuchiya
  • Recording/reproducing apparatus
    Patent number: 6717761
    Abstract: A recording/reproducing apparatus capable of switching over among a plurality of heads with high precision, wherein the apparatus is provided with: a recording/reproducing unit for recording/reproducing signals onto/from a recording medium with a plurality of heads; a generating unit for generating control data for controlling the recording/reproducing unit; and a transmitting unit for transmitting control data generated by the generating unit to the recording/reproducing unit, wherein priority is given in transmission to data for controlling the switching of the plurality of heads over other data.
    Type: Grant
    Filed: March 26, 2001
    Date of Patent: April 6, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Shigeru Yamazaki, Kemmei Masuda, Toshio Tsuchiya
  • Recording/reproducing apparatus
    Publication number: 20010048565
    Abstract: A recording/reproducing apparatus capable of switching over among a plurality of heads with high precision, wherein the apparatus is provided with: a recording/reproducing unit for recording/ reproducing signals onto/from a recording medium with a plurality of heads; a generating unit for generating control data for controlling the recording/reproducing unit; and a transmitting unit for transmitting control data generated by the generating unit to the recording/reproducing unit, wherein priority is given in transmission to data for controlling the switching of the plurality of heads over other data.
    Type: Application
    Filed: March 26, 2001
    Publication date: December 6, 2001
    Applicant: HITACHI, LTD.
    Inventors: Shigeru Yamazaki, Kemmei Masuda, Toshio Tsuchiya