HARD-COPY FOR ANTI-SHRINK - ANTI-COPY OPTICAL MEDIUM
1 Assignment
0 Petitions
Accused Products
Abstract
A recording medium configured to unmask read of data thereon, or a portion of data thereon, upon an optical state change of a state change material on or in the recording medium, said recording medium having a code stored thereon which causes interrogation for a verification material on or in the recording medium and which permits full read of the information stored on the medium only if such verification material is detected in a defined manner.
4 Citations
6 Claims
-
1. (canceled)
-
2. (canceled)
-
3. (canceled)
- 4. A recording medium configured to unmask read of data thereon, or a portion of data thereon, upon an optical state change of a state change material on or in the recording medium, said recording medium having a code stored thereon which causes interrogation for a verification material on or in the recording medium and which permits full read of the information stored on the medium only if such verification material is detected in a defined manner.
Specification