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:
Jun. 08, 2004
Filed:
Feb. 25, 2000
Applicant:
Inventors:
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04Q 5/22 ; G05B 1/900 ; G06F 7/04 ; G08B 2/900 ; H04B 1/00 ;
U.S. Cl.
CPC ...
H04Q 5/22 ; G05B 1/900 ; G06F 7/04 ; G08B 2/900 ; H04B 1/00 ;
Abstract
An IC card has an ID number ID , for permitting itself to be identified, stored in memory provided therein. The IC card also has additional ID numbers ID to IDn stored in memory areas - to - that are secured therein so as to be allocated to the individual providers that manage the reader/writers with which the IC card communicates. These additional ID numbers ID to IDn are used to prevent unauthorized use of the IC card, and are issued so as to be unique to the IC card by the individual providers that use the memory areas - to - . Thus, the additional ID numbers ID to IDn differ from one IC card to another.