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:
Jan. 20, 2004
Filed:
Jul. 05, 2000
Applicant:
Inventors:
Shuichi Ito, Tokyo, JP;
Tatsuya Inokuchi, Kanagawa, JP;
Yoichiro Sako, Tokyo, JP;
Masayuki Obata, Tokyo, JP;
Kazuko Sakurai, Tokyo, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 3/90 ;
U.S. Cl.
CPC ...
G11B 3/90 ;
Abstract
The invention provides a data recording medium and a data recording apparatus which are large in recording capacity and comparatively low in cost and secures protection of recorded information. The data recording medium has a data recording area, in which quantitative limitation information of a number of pieces of information grasped based on an information identification code regarding information to be recorded is recorded in advance.