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:
Dec. 28, 2010
Filed:
Nov. 01, 2007
Gregor Ponert, Salzburg, AT;
Gregor Ponert, Salzburg, AT;
SkiData AG, Groedig/Salzburg, AT;
Abstract
A system has a plurality of groups of service facilities, each facility having an access control device with a read/write device for a contactless data carrier. The read/write devices of each group are networked with a separate database provided for each group. The data carrier has an identification number and a transaction counter with a transaction number which is changed upon a change of application data stored thereon. The application data, the identification number and the transaction number are stored in the database of the group to which the user goes for access. Upon access to a service facility, only the identification number and the transaction number are read from the data carrier. If the identification number and transaction number match with the identification number and transaction number stored in the database, the application data is retrieved from the database, and in case of a valid access authorization, the access control device permits access without reading application data from the data carrier.