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US 2006/0234003 A1Published application
Piracy-protected recording media
OwnerRichard Selinfreundinventor
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Abstract
An optical medium piracy system employing a state-change material in association with a digital data indicia, wherein when state-change material is activated to change state, the optical medium moves from an unreadable to a readable condition, or from a less readable to more readable condition.
Claims8
A piracy-protected recording medium comprising:
- a data portion comprising indicia readable by a recording medium reader as data;
- and
- a state-change material in association with at least a part of said data portion;
- wherein the state-change material is operationally configured to interfere with the read by said reader of said data portion of said recording medium when in a first unactivated state but permits enhanced read by said reader of said data portion when in a second activated state.
1 more element
Dependencies are inferred from the claim text.