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:
Dec. 17, 2002
Filed:
Sep. 13, 1999
Applicant:
Inventors:
Tatsuya Inokuchi, Kanagawa, JP;
Yoichiro Sako, Tokyo, JP;
Masayuki Obata, Tokyo, JP;
Shuichi Ito, Tokyo, JP;
Kazuko Sakurai, Chiba, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 1/760 ; G06K 1/906 ; H04K 1/00 ;
U.S. Cl.
CPC ...
G06F 1/760 ; G06K 1/906 ; H04K 1/00 ;
Abstract
A recording medium such as an optical disk has a write-once recording area in which information can be recorded once and cannot be rewritten. The write-once recording area is provided with a billing information recording area in which billing information is sequentially recorded a single time. With this arrangement, it is possible to effectively prevent the unauthorized use of the medium when carrying out off-line billing processing.