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:
Aug. 19, 2008
Filed:
Jun. 18, 2003
Masaharu Ukeda, Yokohama, JP;
Motoyasu Tsunoda, Sagamihara, JP;
Nagamasa Mizushima, Fujisawa, JP;
Kunihiro Katayama, Chigasaki, JP;
Masaharu Ukeda, Yokohama, JP;
Motoyasu Tsunoda, Sagamihara, JP;
Nagamasa Mizushima, Fujisawa, JP;
Kunihiro Katayama, Chigasaki, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A storage device allows expanding user utilizable applications by storing information permitted to be read according to a certificate and information permitted to be read according to information determined by a user. An information distributor receives a certificate from the storage device and after verifying the certificate, transmits data of a license and access control conditions to the storage device. After receiving data of a certificate from an information browser, verifying the certificate and imposing a limit on access based upon one of access control conditions, the storage device transmits data of the license and the other to the information browser. The information browser permits utilization of the license under the limitation defined by the access control condition. The certificate includes either or both of a certificate approved by a certificate authority and a PIN (personal identifying number) determined by the user.