Optical disk medium and optical disk indentification method...

Details Optical disk medium and optical disk indentification method... Optical disk medium and optical disk indentification method...

2005-02-01

2005-02-01

Edun, Muhammad (Department: 2655)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S275400, C369S047460, C369S053200

Reexamination Certificate

active

06850478

ABSTRACT:
The reproduction-only disk medium of the present invention includes preformed first information, in which the first information is formed in the same format as second information recorded on a prescribed recordable disk medium; and a direction along which the first information is formed on the reproduction-only disk medium is opposite to a direction along which the second information is recorded on the prescribed recordable disk medium.

REFERENCES:
patent: 6337839 (2002-01-01), Nakane et al.
patent: 0 694 920 (1996-01-01), None
patent: 05-067335 (1993-03-01), None
patent: 09-055016 (1997-02-01), None
patent: 9715050 (1997-04-01), None
International Search Report, Application No. PCT/JP00/05944, dated Jan. 16, 2001.

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