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. 21, 1988
Filed:
Jul. 24, 1986
Kenji Rikuna, Tokyo, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Abstract
In an IC (integrated circuit) system, a first IC card owned by a cardholder and a second IC card owned by a person other than the cardholder are employed. The first IC card is a normal IC card having a memory for previously storing a personal identification number. The first IC card includes a comparator. The second IC card is a remote PIN entry card having a keyboard for entering the PIN by a cardholder. After the PIN has been entered by the cardholder in the remote PIN entry card, this card is loaded by the person into a card terminal. Then, the PIN entered in the remote PIN entry card is transferred into the card terminal, and thereafter the PIN of the card terminal is transferred into the IC card so as to identify whether the cardholder is an authorized cardholder or not by comparing in the comparator both the PIN's with each other.