Dynamic optical information storage or retrieval – Optical storage medium structure – Disk hub
Reexamination Certificate
2007-03-27
2007-03-27
Davis, David (Department: 2627)
Dynamic optical information storage or retrieval
Optical storage medium structure
Disk hub
Reexamination Certificate
active
10419160
ABSTRACT:
The present invention is directed to an optical disk having a projection that prevents full contact of the upper surface of the disk when engaging a supporting surface. The optical disk includes a projection formed in a central portion of the optical disk that abuts or is near the upper surface of a protecting layer.
REFERENCES:
patent: 5323381 (1994-06-01), Takahashi et al.
patent: 5859834 (1999-01-01), Takahashi et al.
patent: 5999513 (1999-12-01), Arakawa et al.
Kim Jin Hong
Lee Jun Seok
Lee Seoung Won
Park Kyung Chan
Seo Hun
Davis David
Harness & Dickey & Pierce P.L.C.
LG Electronics Inc.
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