Patents by Inventor Demura Masayuki

Demura Masayuki 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).

  • Integrated multiple channel data reliability testing for a magnetic tape drive
    Patent number: 7573664
    Abstract: Data reliability testing for a magnetic tape drive is conducted separately for the channels of a magnetic tape drive which write and read tracks of a multiple track magnetic tape. Memory stores testing data representing data separately written to tracks of a multiple track magnetic tape; each of a plurality of read channels reads data sensed by a tape head from a separate track of a magnetic tape; and error processing logic detects differences between data from each of a plurality of the read channels, and stored testing data of the memory representing data written to the same separate tracks.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: August 11, 2009
    Assignee: International Business Machines Corporation
    Inventors: Steven Ross Bentley, Robert Allen Hutchins, Demura Masayuki, Shuhei Nadehara
  • Integrated multiple channel data reliability testing for a magnetic tape drive
    Publication number: 20060119962
    Abstract: Data reliability testing for a magnetic tape drive is conducted separately for the channels of a magnetic tape drive which write and read tracks of a multiple track magnetic tape. Memory stores testing data representing data separately written to tracks of a multiple track magnetic tape; each of a plurality of read channels reads data sensed by a tape head from a separate track of a magnetic tape; and error processing logic detects differences between data from each of a plurality of the read channels, and stored testing data of the memory representing data written to the same separate tracks.
    Type: Application
    Filed: December 3, 2004
    Publication date: June 8, 2006
    Inventors: Steven Bentley, Robert Hutchins, Demura Masayuki, Shuhei Nadehara