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:
Jul. 14, 2009
Filed:
Nov. 29, 2001
Helmut Scherzer, Tuebingen, DE;
Helmut Scherzer, Tuebingen, DE;
International Business Machines Corporation, Armonk, NY (US);
Abstract
The present invention relates to an electronic purse data carrier for performing monetary transactions and a method for managing electronic payments with such a carrier. The purse stores one or more payment units each having a respective monetary value, whereby each of said payment units has a respective unique payment unit-ID and comprises an age information evaluable for delimiting the use of it. In particular said information defines a dynamically changing age level. This can be used to force purse owners to return each electronic monetary unit back to the issuing party after a specified cycle measured in time or transactions has passed in order to validate the authenticy, and in particular in order to test for possibly duplicated monetary units.