04614861 is referenced by 694 patents and cites 28 patents.

A unitary, self-contained card (10) which does not require interaction with a fixed terminal device to prevent monitoring of confidential information contained within the card (10). The unitary, self-contained card (10) has the ability to verify a personal identification number (PIN) which is entered directly into the card by way of a keyboard (12) without the use of an outside terminal and produce a transaction identification code (TIC) which varies for each transactional use of the card (10) and which can later be verified to determine the validity of the transaction. The card (10) is capable of storing issue and expiration dates, credit limit balances and other card transactional data. The card (10) can be used in conjunction with a validation system (102) with provisions for verifying information recorded on the magnetic indicia (22) of the card (10). The card (10) can also be used with peripheral devices (96) which function to verify the validity of the transaction from the transaction identification code (TIC).

Title
Unitary, self-contained card verification and validation system and method
Application Number
6/671748
Publication Number
4614861
Application Date
November 15, 1984
Publication Date
September 30, 1986
Inventor
Nabil M Aba Jbara
Colorado Springs
CO, US
Leonidas P Pavlov
Colorado Springs
CO, US
Agent
William W Cochran II
Assignee
Intellicard International
CO, US
IPC
G06K 5/00
View Original Source