Patents Assigned to Sanyo Electric Corporation Limited
  • Optical disc and optical disc drive
    Patent number: 6760290
    Abstract: A disc-shaped optical record carrier includes a first area having a spiral track extending in a first direction from an inner side on the disc, and a second area having a spiral track extending in a second direction opposite to the first direction, from an outer side on the disc located on the same plane as the first area on the disc, wherein one of the first and second areas is assigned a recordable area and the other is assigned a read only area.
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: July 6, 2004
    Assignees: Hitachi Maxell Limited, Olympus Optical Corporation Limited, Sanyo Electric Corporation Limited
    Inventors: Tamotsu Iida, Yoshiro Yoda, Kazuo Ito