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:
Mar. 29, 1994
Filed:
Feb. 25, 1992
Peter Wratil, Rosengarten/Klecken, DE;
Klockner-Moeller GmbH, Bonn, DE;
Abstract
The invention relates to a method for the coding and the availability of a chip card, which is provided as memory storage in a programmable control system. During the initial operation of a chip card with a control system a coding process is performed. The coding process specifies the chip card to the control system and encodes the chip card. The chip card can only be copied after the coding process. However, the copy can only be used in the control system on which the original or master chip card was coded. In the event of a defect in the system hardware, a chip card may be used in a second control system so that the total system installation remains available. The second control system remains functionally operable with a chip card for a time-limited period if the code of the chip card does not coincide with the code of the control system.