Patent · US Expired

Credit card

US3972138A · kind A · utility

14Cited by

8References

8Claims

0Family size

Inventors

Thomas Armbruster · Walldorf, DE
Willliam N. Hill · Titicus, US

Key dates

Filing date	Sep 30, 1974
Grant date	Aug 3, 1976
Priority date	—
Expiry date	Sep 30, 1994

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S283/904
WIPO fieldControl
WIPO sectorInstruments

Abstract

An improved credit card construction includes visible information embossed thereon as well as the improvement of a slot having at least one magnetizable signal carrying tab movable to a desired index position. The credit card user places the tab in the correct index position to identify the user of the card as the proper user. When the card is not in use, the indexing tab is maintained in some other position in the indexing slot. The construction eliminates misuse of the credit card since only the proper owner knows the appropriate indexing tab position.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.