05770843 is referenced by 360 patents and cites 14 patents.

A system for ascertaining identity of a customer based on a single card carried by the customer. The card bears a machine-readable code, which is transmitted to a database at a remote location. The database locates a record associated with the code, which contains one or more account numbers. Associated with each account number is a Personal Identification Number, PIN. (It is possible that all PINs are identical.) The customer selects an account number, and is asked for a PIN. If the PIN given by the customer matches that of the account number, the customer is concluded to be the valid owner of the account, and a transaction is allowed to proceed.

Title
Access card for multiple accounts
Application Number
8/674557
Publication Number
5770843
Application Date
July 2, 1996
Publication Date
June 23, 1998
Inventor
Lee W Hoevel
Dayton
OH, US
Manning I Rose
Kettering
OH, US
Agent
Gregory A Welte
Assignee
NCR Corporation
OH, US
IPC
G06K 5/00
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