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:
Jan. 20, 2004
Filed:
Nov. 05, 2002
Applicant:
Inventors:
Junichi Hikita, Kyoto, JP;
Yoshihiro Ikefuji, Kyoto, JP;
Shigemi Chimura, Kyoto, JP;
Haruo Taguchi, Kyoto, JP;
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Primary Examiner:
Int. Cl.
CPC ...
G06K 5/00 ;
U.S. Cl.
CPC ...
G06K 5/00 ;
Abstract
A memory ( ) in a non contact type IC card ( ) includes a data protection region (B ) storing data requiring security and an region (B ) storing other data. A main control circuit ( ) generates data to be stored and designates a location for data storage in the region (B ) or the data protection region (B ) according to a content of the data. An address non selecting circuit ( ) selects whether the generated data is to be written into the location in the data protection region (B ) designated by the main control circuit ( ) according to a state of a state setting circuit ( ).