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:
Jul. 29, 2008
Filed:
Apr. 29, 2004
Yutaka Takami, Yokohama, JP;
Shinichiro Fukushima, Yokohama, JP;
Kazunori Hashimoto, Fujisawa, JP;
Makoto Aikawa, Sagamihara, JP;
Tetsuharu Inamitsu, Chigasaki, JP;
Yutaka Takami, Yokohama, JP;
Shinichiro Fukushima, Yokohama, JP;
Kazunori Hashimoto, Fujisawa, JP;
Makoto Aikawa, Sagamihara, JP;
Tetsuharu Inamitsu, Chigasaki, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Information recorded by an application provider in an IC card can be referred to, read out or changed by another application provider. The IC card has a plurality of cipher keys for reading out or writing the information recorded in the IC card, and provides a cipher key conversion function for encryption with a file capable of being managed, read out or written by the application provider himself using the cipher key. By the cipher key conversion function, data can be read out or written from or in the file of the other application provider.