Patents by Inventor Ryuuich Naito

Ryuuich Naito 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).

  • Control method of disk drive for recordable optical disk
    Patent number: 5068842
    Abstract: A control method of a disk drive for a recordable optical disk whose information storage area is divided into plural bands and comprises first sectors for recording user data and third sectors for recording defect management this information represents addresses of the defect first sectors and corresponding second sectors. The control method includes the steps of receiving a command to get access to an indicated address, reading out the latest defect management information in the band including a sector of the indicated address, and storing the latest defect management information on a memory in the disk drive.
    Type: Grant
    Filed: November 7, 1988
    Date of Patent: November 26, 1991
    Assignee: Pioneer Electronic Corporation
    Inventor: Ryuuich Naito