05446724 is referenced by 24 patents and cites 27 patents.

A recording medium is provided for use with a device for recording data on and reading data from the recording medium using first and second recording and reading methods. A first recording region of the recording medium stores data recorded using the first method and includes blocks having a first data storage capacity. A second recording region of the recording medium stores data recorded using the second method and includes blocks having a second data storage capacity. The first and second recording regions may be, for example, first and second offset helical grooves formed on the recording medium. A device for recording and reading data on the recording medium using the first and second recording methods in accordance with identification data identifying the methods is also provided.

Title
Information storage medium with first and second recording regions each having a predetermined recording density
Application Number
7/894628
Publication Number
5446724
Application Date
June 5, 1992
Publication Date
August 29, 1995
Inventor
Kouichi Yoneyama
Kanagawa
JP
Koichi Tabe
Kanagawa
JP
Agent
Banner & Allegretti
Assignee
Kabushiki Kaisha Toshiba
JP
IPC
G11B 7/007
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