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:
Oct. 07, 2003
Filed:
Dec. 10, 1999
Applicant:
Inventors:
Masaru Ohki, Tokorozawa, JP;
Yasuko Fukuzawa, Yokohama, JP;
Susumu Okuhara, Yokohama, JP;
Masahiro Kaminaga, Sakado, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 2/704 ; H01L 2/182 ; H01L 2/1822 ;
U.S. Cl.
CPC ...
H01L 2/704 ; H01L 2/182 ; H01L 2/1822 ;
Abstract
A relation between the data process contents in an IC card chip and the consumption current of the IC card chip is reduced. Prior to executing an input data process of the IC card chip, the input data is transformed to thereby reduce the relation between the process data and the consumption current of the IC card chip. After the transforming process, the transformed data is untransformed to obtain a correct process result.