Copy-protected optical media and method of manufacture thereof

Details Copy-protected optical media and method of manufacture thereof Copy-protected optical media and method of manufacture thereof

2005-01-04

2005-01-04

Mulvaney, Elizabeth (Department: 1774)

Stock material or miscellaneous articles

Circular sheet or circular blank

C428S064400, C430S270110

Reexamination Certificate

active

06838145

ABSTRACT:
A computer-readable medium having material at a select position therein and containing instructions for controlling an optical reader to cause the optical reader to re-read the position having the material one or more times to elicit a measurable parameter at such position.

REFERENCES:
patent: 6589626 (2003-07-01), Selinfreund et al.
patent: 6638593 (2003-10-01), Selinfreund et al.
patent: 20030147339 (2003-08-01), Selinfreund et al.
patent: 20040004922 (2004-01-01), Selinfreund et al.

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