The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 06, 2018
Filed:
Feb. 23, 2015
Applicant:
Thomson Licensing, Issy les Moulineaux, FR;
Inventors:
Alan Bruce Hamersley, Newbury Park, CA (US);
John Matthew Town, Ojai, CA (US);
Holger Hofmann, Ingelheim, DE;
Assignee:
Thomson Licensing, ssy les Moulineaux, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 9/80 (2006.01); G06F 17/30 (2006.01); H04N 7/16 (2011.01); G06F 7/04 (2006.01); G11B 20/00 (2006.01);
U.S. Cl.
CPC ...
G11B 20/00123 (2013.01);
Abstract
Authentication of discs occurs by the use of interferometric authentication data. Such authentication data of a data disc is generated based on an interference pattern associated with thickness variations of a material layer on the disc. The interference pattern represents a unique fingerprint that can be used for authentication of individual discs.