Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2004-09-15
2009-12-01
Feild, Joseph H (Department: 2627)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S053340
Reexamination Certificate
active
07626904
ABSTRACT:
An apparatus and method for testing mechanical endurance of a surface of an optical disc is disclosed, which includes a rotating plate on which the optical disc is fixed to generate scratch thereon, and rotating the fixed optical disc; and a plurality of abrasion wheels disposed in perpendicular to the rotating plate, and being in contact with the surface of the optical disc, to generate the scratch on the surface of the optical disc, wherein, the scratches generate when the optical disc rotates a predetermined turn, e.g. below ten turns for applying a predetermined load generated from the abrasion wheel on the optical disc.
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Kim Jin Hong
Kim Jin Yong
Lee Seung Yoon
Seo Hun
Feild Joseph H
Harness Dickey & Pierce PLC
Lamb Christopher R
LG Electronics Inc.
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