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:
Jun. 29, 2010
Filed:
Feb. 16, 2005
Masato Otsuka, Minato-ku, JP;
Eiji Sahota, Ashigarakami-gun, JP;
Yoshiharu Tami, Ashigarakami-gun, JP;
Masato Otsuka, Minato-ku, JP;
Eiji Sahota, Ashigarakami-gun, JP;
Yoshiharu Tami, Ashigarakami-gun, JP;
Memory-Tech Corporation, Ibaraki, JP;
Hitachi Computer Peripherals Co., Ltd., Kanagawa, JP;
Abstract
An optical disc manufacturing apparatus () recording a BCA code constituted by plural marks and including a secret code which is modulated in a range capable of recognizing a position in a radial direction of an optical disc and/or a position in a track direction of the plural marks as the BCA code, a BCA history database () storing a history including a correspondence between the BCA code of an optical disc () recording the BCA code and the secret code, and a management center () reading the BCA code and the secret code recorded on the optical disc so as to compare both on the basis of input of the correspondence between the BCA code and the secret code stored in the BCA history database () are employed, whereby an illegally manufactured optical disc () can be easily found by inspecting the recorded BCA code and secret code.