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. 01, 2010
Filed:
Apr. 07, 2005
Futoshi Nakabe, Hiroshima, JP;
Eiji Ueda, Kure, JP;
Futoshi Nakabe, Hiroshima, JP;
Eiji Ueda, Kure, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The present invention aims at providing a contactless card that enables a reader/writer to identify which card such reader/writer is communicating with in a set of card identification processes and that improves the possibility of protecting the cardholder's privacy. Contactless card () includes: power detection unit (); random number ID generation unit () that determines an identifier that identifies card (), every time power detection unit () detects that electric power has been supplied; ID storage unit () that holds the determined identifier; sending/receiving circuit () that receives a command requesting that the identifier that identifies card () should be sent to reader/writer (), and sending/receiving circuit () sends, to reader/writer (), the determined identifier in the case where the received command is a first-received command, and the held identifier in the case where the received command is a second- or later-received command.