Compact disc comprising an antipiracy marking and method of prov

Details Compact disc comprising an antipiracy marking and method of prov Compact disc comprising an antipiracy marking and method of prov

1995-09-27

1997-09-23

Vargot, Mathieu D.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

264 133, 264 136, 369273, 425810, G11B 700, B29D 1100

Patent

active

056712057

ABSTRACT:
A method for providing compact discs with an antipiracy marking and a mold for pressing compact discs for making compact discs carrying an antipiracy marking as well as compact discs comprising an antipiracy marking pattern, the compact disc consisting of a substrate including on one of its sides the information to be read by the compact disc player and on the opposite side an antipiracy marking pattern.

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patent: 5189531 (1993-02-01), Palmer et al.
patent: 5293373 (1994-03-01), Toide et al.
patent: 5346654 (1994-09-01), Kodaka et al.
patent: 5452282 (1995-09-01), Abraham
patent: 5533002 (1996-07-01), Abraham
patent: 5538773 (1996-07-01), Kondo

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