Credit verification system

Details Credit verification system Credit verification system

1990-12-11

1993-07-27

Envall, Jr., Roy N.

Boots, shoes, and leggings

3649183, 34082533, 235380, G06F 1520, G06G 752

Patent

active

052315703

ABSTRACT:
A credit card status verification system is disclosed in which the status of very large numbers of credit cards is contained and accessed from a compact storage media, such as a CD-ROM disk, at a remote location, thereby eliminating the necessity of obtaining the status information from a centrally located facility via a communication link. A data mapping algorithm is employed to map credit card numbers to status containing locations within memory without requiring large amounts of memory space for addressing. A multiple level screening process is employed for checking the validity of a credit card number and the credit status of a credit card which is both quick and economical.

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patent: 3564210 (1971-02-01), Presti
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patent: 3740530 (1973-06-01), Hoffer et al.
patent: 3818187 (1974-06-01), Lovendusky et al.
patent: 3891830 (1975-06-01), Goldman
patent: 3938090 (1976-02-01), Borison et al.
patent: 3982103 (1976-09-01), Goldman
patent: 4016404 (1977-04-01), Appleton
patent: 4264782 (1981-04-01), Konheim

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