Piracy-protected recording media
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United States of America Patent
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Issued Date -
Oct 19, 2006
app pub date -
Apr 14, 2006
filing date -
Apr 18, 2005
priority date (Note) -
Abandoned
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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.
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