Contactless data carrier

Details Contactless data carrier Contactless data carrier

2004-04-13

2010-11-23

Hess, Daniel A (Department: 2876)

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Conductive

Reexamination Certificate

active

07837119

ABSTRACT:
The invention relates to an apparatus as well as a method for reliably determining the deliberate use of a contactless data carrier. Beside an antenna-based data transmission channel in dependence on the data to be transmitted additionally an optical data transmission channel between reading device and data carrier can be employed.

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patent: 2003/0052159 (2003-03-01), Kawan
patent: 2003/0057276 (2003-03-01), Appalucci et al.
patent: 2005/0184150 (2005-08-01), Welte et al.
patent: 2 770 316 (1999-04-01), None

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