Patent · US Active

Method and apparatus for determining if an optical disk originated from a valid source

US7693336B2 · kind B2 · utility

2Cited by

6References

20Claims

0Family size

Assignee

Fraudhalt Limited · IE

Inventors

Phelim O'Doherty · Dublin, IE
Patrick J. Smith · Boulder, US
Carlos Luna · Placentia, US
Sean McCarthy · Dublin, IE

Key dates

Filing date	Feb 13, 2006
Grant date	Apr 6, 2010
Priority date	—
Expiry date	Nov 2, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG11B23/284
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method and apparatus for determining if an optical disk originated from a valid source, the method and apparatus scanning one major surface of the optical disk for mechanical surface imperfections, storing the locations of the surface imperfections relative to a datum, comparing a parameter of each of the locations of the surface imperfections with corresponding parameters of a master disk of known source for determining if the disk originated from the source from which the master disk originated.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.