Machine-readable optical disc with reading-inhibit agent

Details Machine-readable optical disc with reading-inhibit agent Machine-readable optical disc with reading-inhibit agent

2004-01-29

2010-12-28

Davis, David D (Department: 2627)

Dynamic information storage or retrieval

Storage medium structure

Layered

C720S718000

Reissue Patent

active

RE042011

ABSTRACT:
An optical disc having machine-readable, information-encoding features is provided with a barrier layer secured to the disc. This barrier layer is configured to prevent machine-reading of the features. A reading-inhibit agent, included in the disc and activated by removal of the barrier layer, is operative, once activated, to alter the disc to inhibit reading of the disc, after some period of time. Alternately, the barrier layer can be eliminated, and the reading-inhibit agent can be activated by initial reading of the disc, as for example by exposure to optical radiation associated with reading of the disc, or rotation of the disc.

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patent: 6537635 (2003-03-01), Bakos et al.
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patent: 0806 768 (1997-11-01), None
patent: 05101471 (1993-04-01), None
patent: 08147856 (1996-06-01), None

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