Information recording medium, information reproduction...

Details Information recording medium, information reproduction... Information recording medium, information reproduction...

2005-08-23

2005-08-23

Hindi, Nabil (Department: 2655)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S053170, C369S053420

Reexamination Certificate

active

06934231

ABSTRACT:
An information recording medium according to an embodiment of this invention has a plurality of disk-like information recording layers, which are adhered to each other within an allowable decentering error range, and a data area assured on each information recording layer, and has guard tracks within the range of a predetermined radial distance from the radial position of the innermost periphery of the data area toward the outer periphery.

REFERENCES:
patent: 6424614 (2002-07-01), Kawamura et al.
patent: 11-144393 (1999-05-01), None
patent: 2000-36130 (2000-02-01), None
U.S. Appl. No. 10/132,469, filed Apr. 26, 2002, Ohsawa.
U.S. Appl. No. 10/668,209, filed Sep. 24, 2003, Hasegawa.

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