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:
Sep. 24, 2002
Filed:
Jul. 07, 1999
Hiroyuki Maeda, Kyoto, JP;
Masanori Fujisawa, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
An IC card may externally display a response state in a data communication performed in response to externally applied data. IC card ( ) is provided with a data protecting memory ( ) for data holding memory ( ). An abnormality determination circuit ( ) determines how data in data holding memory ( ) has been processed. If abnormality determination circuit ( ) determines that the externally applied data has been normally written in data holding memory ( ), a response state display ( ) gives a normal communication completion indication in response to an instruction from a main control circuit ( ). Meanwhile, if the presence of an abnormality is determined in the state of writing data, and the data in data holding memory ( ) has been recovered using data in data protecting memory ( ), response state display ( ) gives a data recovery indication. If the recovery of the data is not successful, a communication abnormality indication is made.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile