Patents by Inventor Toshiyuki Kasada

Toshiyuki Kasada 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).

  • Erasing and recovering system for data block on a magnetic tape
    Patent number: 5327301
    Abstract: In an erasing and recovering system for a data block on a magnetic tape in a magnetic tape recording and reproducing apparatus, the system includes: a detecting unit for detecting data error caused by a damaged portion on the magnetic tape by reading a data block just after the data block is written to the magnetic tape; a calculating unit for calculating the circumference of the magnetic tape including the damaged portion; an erasing unit for erasing half of the circumference including the damaged portion; and a data write unit for re-writing the same data block as the data block including the error into another half of the same circumference as the circumference including the damaged portion.
    Type: Grant
    Filed: March 18, 1992
    Date of Patent: July 5, 1994
    Assignee: Fujitsu Limited
    Inventors: Naoki Hirabayashi, Toshiya Nakajima, Toshiyuki Kasada, Keiichi Kato, Kinya Saito