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:
Mar. 28, 1995
Filed:
Feb. 18, 1992
Hiroya Yoshida, Uji, JP;
Omron Tateisi Electronics Co., Kyoto, JP;
Abstract
An IC card is provided with a data storage area for storing data, an identification code area for storing a plurality of identification codes and directories for storing information indicating which of the identification codes is an identification code authorized to access the data. When an identification code and information for identifying data are applied so as to make access to a data area in the IC card from the outside of the IC card, the IC card references the directories, recognizes which of the identification codes is an identification code authorized to access data, corresponding to the externally applied information for identifying data, and determines whether or not the identification code corresponds to the externally applied identification code. If there are a plurality of identification codes authorized to access the data, corresponding to the information for identifying data in the directories and a plurality of identification codes are externally applied, checking between the identification codes is performed. Only when all the identification codes correspond to the externally applied identification codes, access of the corresponding data is allowed.