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. 27, 1999
Filed:
Mar. 28, 1997
Applicant:
Inventor:
Yasuo Iijima, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K / ; G06K / ;
U.S. Cl.
CPC ...
235492 ; 235487 ; 902-1 ;
Abstract
A file managing method includes a step of setting a key data of a portable storage medium having a plurality of storage areas, a step of determining whether the key data is changed, a step of inhibiting data from being processed in the plurality of storage areas when it is determined that the key data is not changed, and a step of processing data of the plurality of storage areas in response to a given command when it is determined that the key data is changed.
Iijima, Yasuo. (1999). File managing method requiring a change in key data and ic card device (U.S. Patent No. 5929428). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5929428
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