Patents by Inventor Yoshiteru Katumura

Yoshiteru Katumura 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).

  • SERVO WRITE METHOD AND SERVO WRITE SYSTEM FOR HARD-DISK DRIVE
    Publication number: 20100134918
    Abstract: A servo write method for a hard-disk drive. The method includes generating, with an input of characteristics of a magnetic-recording head and a magnetic-recording disk which are incorporated into the hard-disk drive, a yield prediction model from a correlation between yields of the hard-disk drive, and characteristics of the magnetic-recording head and the magnetic-recording disk of the hard-disk drive in a process. The method also includes predicting a yield which is obtained when each magnetic-recording head is used as a position control head, selecting as the position control head a magnetic-recording head that has a highest predicted yield, and writing a servo signal.
    Type: Application
    Filed: December 3, 2009
    Publication date: June 3, 2010
    Inventors: Yasunori Nishimoto, Yoshiteru Katumura, Hiroshi Fukuyama, Naoki Shimamura