The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 05, 1996
Filed:
Apr. 28, 1995
Gerhard Raimann, Alland, AT;
Landis & Gyr Business Support AG, Zug, CH;
Abstract
In a method for payment for services and/or goods, an apparatus with a data terminal device for reading and changing an amount value in a credit balance carrier and a security module provided with a first memory area and a second memory area is used, which is connected to the data terminal device via a communications channel. In a first transaction a usable amount is transferred from the credit balance carrier to the first memory area. During the purchase of the service and/or goods, a running cost amount for the service and/or goods, in a second transaction an unused amount is transferred from the first memory area to the credit balance carrier. In a third transaction the difference between the usable amount and the unused amount is transferred from the first memory area to the second memory area. The apparatus is provided with an inhibiting and/or enabling mechanism which only permits transactions to the credit balance carrier from the first memory area and thus, does not permit transactions to the credit balance carrier from the second memory area.