Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2005-11-22
2005-11-22
Huber, Paul W. (Department: 2653)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S053260
Reexamination Certificate
active
06967917
ABSTRACT:
An optical disk using both grooves and lands as a recording track is provided with {circle around (1)} a data area for recording/reproducing data and {circle around (2)} DMAs (Data Management Areas) for managing a defective sector in the data area. The DMAs include four DMAs A–D all formed on the lands. The DMA B(D) is formed behind the ending sector of the DMA A(C). This arrangement realizes a DMA format having high resistance to defects and improving a processing rate. Consequently, highly reliable optical disk and optical disk apparatus can be provided.
REFERENCES:
patent: 5404357 (1995-04-01), Ito et al.
patent: 6038209 (2000-03-01), Satoh
German Patent Office Action dated Aug. 7, 2001 re Serial No. 100 21 079.1-53 and English translation.
“AS-MO (Advanced Storage-Magneto Optical Disk) Version 1.0, Part 1—Physical Specifications—” (FUJITSU LIMITED, Hitachi, Ltd., Hitachi Maxell, Ltd., Imation Corp. OLYMPUS OPTICAL CO., LTD., Philips Electronics N.V., Sanyo Electric Co., Ltd., Sharp Corporation, Sony Corporation, pp. cover, i-vii, 53-64, Apr. 1998.).
Maeda Shigemi
Numata Tomiyuki
Conlin David G.
Edwards & Angell LLP
Hartnell, III George W.
Huber Paul W.
Sharp Kabushiki Kaisha
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