Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Reexamination Certificate
2008-05-20
2008-05-20
Dinh, Tan (Department: 2627)
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
C428S064100
Reexamination Certificate
active
10023424
ABSTRACT:
Theft, distribution, and piracy of digital content on optical media (software, video, audio, e-books, any content of any kind that is digitally stored and distributed) is often accomplished by copying it directly to another disc using commonly available copy tools and recordable optical media, or the copying of media to another mass manufactured disc. Methods which cause the copy process to become lengthy and inconvenient, or which produce copies that are significantly measurably different from the original and therefore be recognizable as copies, deter or prevent an unauthorized individual from making copies. This is accomplished by modifying the optical path of an optical medium to include regions of selective distortion. This, in turn, modifies the read operation of the data in the regions, which can be used to identify and authenticate the medium.
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Hart, III John J.
Howard Daniel G.
Lee Andrew R.
LeVine Richard B.
Dinh Tan
ECD Systems, Inc.
Mills & Onello LLP
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