05177342 is referenced by 294 patents and cites 8 patents.

A transaction approval system (10) is disclosed which includes various enhancements to existing systems. For example, the transaction limit (30) stored in the terminal can by dynamically adjusted to vary the level of risk at the terminal to be closer to the desired level of risk. The terminal will also generate and store a list of account numbers (44,46) which might be invalid and should provode an on-line request for authorization.

Title
Transaction approval system
Application Number
7/611933
Publication Number
5177342
Application Date
November 9, 1990
Publication Date
January 5, 1993
Inventor
Carl A Adams
San Francisco
CA, US
Agent
John P Sutton
Assignee
Visa International Service Association
CA, US
IPC
G06F 15/21
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