Communications: electrical – Land vehicle alarms or indicators – Of burglary or unauthorized use
Reexamination Certificate
1999-12-17
2009-06-23
Beamer, Temica M. (Department: 2681)
Communications: electrical
Land vehicle alarms or indicators
Of burglary or unauthorized use
C340S426280, C340S428000
Reexamination Certificate
active
07551066
ABSTRACT:
A method for transmitting data for a security device, in particular for access authorization systems and/or driving authorization systems of a motor vehicle, in which data are transmitted over the air from a transmitter unit to a receiver unit.In a method in which, despite contactless interrogation of the identification signal transmitter, an authorizing access information item cannot be obtained by a third party, the data are transmitted, after capacitive coupling of the transmitter unit and receiver unit, from the transmitter to the receiver using a signal which is generated by a capacitive alternating field.
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Beamer Temica M.
Farber Martin A.
Mannesmann VDO AG
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