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:
Aug. 10, 2004
Filed:
Nov. 09, 2001
Atsushi Watanabe, Kyoto, JP;
Satsoshi Nishiumi, Kyoto, JP;
Nintendo Co., Ltd., Kyoto, JP;
Abstract
An optical disk includes a feature forming area and a criterion recording area . The feature forming area is an area provided with physical features used for determining whether it is an authorized optical disk or not. The criterion recording area is an area having recorded therein the data of a determination criterion, i.e., a criterion by which it is determined whether the optical disk has been produced in an authorized manner or not on the basis of the physical feature. An optical disk reproduction apparatus detects the physical features provided in the feature forming area , and reads the determination criterion recorded in the criterion recording area . Furthermore, based on the determination criterion which has been read, the optical disk reproduction apparatus determines whether or not the detected physical features are those provided for an authorized optical disk. Thus, the optical disk reproduction apparatus can determine whether or not the optical disk has been copied in an unauthorized manner.