Revalidatable service supplying system

Details Revalidatable service supplying system Revalidatable service supplying system

1987-12-18

1990-03-13

Trafton, David L.

Registers

Systems controlled by data bearing records

Credit or identification card systems

235436, 235449, 902 4, G06K 500

Patent

active

049084992

ABSTRACT:
The system comprises memory cards and card readers. The card memories (MEM) include validation memory points V.sub.j and credit memory points C.sub.i,j. The addresses of the validation points V.sub.j and the addresses of the associated credit point C.sub.i,j are defined by a reference table (TRR) and a permutation table (TP) which make use of a data item (Z.sub.F) which is specific to the card.

REFERENCES:
patent: 4013894 (1977-03-01), Foote et al.
patent: 4346290 (1982-08-01), Rossi
patent: 4385231 (1983-05-01), Mizutani et al.
patent: 4395626 (1983-07-01), Barker et al.
patent: 4620727 (1986-11-01), Stockburger et al.
patent: 4629873 (1986-12-01), Stockburger et al.

Affiliated with

Also associated with

Rating

Revalidatable service supplying system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Revalidatable service supplying system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Revalidatable service supplying system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-52166