IC card and IC card system

Boots – shoes – and leggings

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Details

3647091, G06F 902

Patent

active

057375828

ABSTRACT:
An IC card and an IC card system that enable a variety of functions to be added to the IC card. A variety of functions are provided for individual key cards (sub-cards), and the individual key card is detachable from the main body of an IC card so that the addition of and change are easily performed by insertion and change of the individual key card.

REFERENCES:
patent: 4683550 (1987-07-01), Jindrick et al.
patent: 4980856 (1990-12-01), Ueno
patent: 5201038 (1993-04-01), Fielder
patent: 5425646 (1995-06-01), Green
patent: 5440755 (1995-08-01), Harwer et al.
patent: 5446869 (1995-08-01), Padgett et al.
patent: 5530887 (1996-06-01), Harper et al.

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