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:
Apr. 20, 2004
Filed:
Feb. 29, 2000
Rohm Co., Ltd., Kyoto, JP;
Abstract
In a communications system having an authentication function, a relaying apparatus is used. This relaying apparatus has an authentication circuit for checking whether reader/writers - to -n are authentic or not by detecting whether or not the authentication signals from the reader/writers - to -n have been subjected to a predetermined calculation operation within the reader/writers - to -n, a multiplexer for switching the lines connecting between the reader/writers - to -n and, a PC in accordance with the results of the authentication processes performed by the authentication circuit , and a calculation circuit for performing a predetermined calculation operation on the authentication signals from the reader/writers - to -n and for feeding them back to the reader/writers - to -n.