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:
Feb. 17, 2009
Filed:
Feb. 06, 2002
Kaoru Murase, Ikoma-gun, JP;
Yoshihiko Motohashi, Osaka, JP;
Masaya Miyazaki, Ikeda, JP;
Yoshikatsu Ito, Hirakata, JP;
Kaoru Murase, Ikoma-gun, JP;
Yoshihiko Motohashi, Osaka, JP;
Masaya Miyazaki, Ikeda, JP;
Yoshikatsu Ito, Hirakata, JP;
Panasonic Corporation, Osaka, JP;
Abstract
In a data nullification device for nullifying target data recorded on a recording medium, target data is made up of a plurality of data blocks. A judging unit judges, in units of data blocks, whether the target data needs to be nullified. A nullifying unit nullifies, when a predetermined number of data blocks are judged as needing to be nullified or when one or more data blocks whose total amount of data reaches a predetermined amount are judged as needing to be nullified, the judged data blocks.