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(11) | EP 1 693 227 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Portable device and method for use thereof |
(57) The present invention provides a portable device (1), comprising first identification
means (7) for wireless transmission and/or reception of electromagnetic radiation
for the purpose of identification thereof, in addition to a system, comprising: a
transmitter for wireless transmission of electromagnetic radiation with at least a
first frequency, a portable device (1) and a receiving circuit for wireless reception
of electromagnetic radiation, wherein a change occurs in the electromagnetic radiation
received by the receiving circuit when the device (1) is located in the vicinity of
the receiving device.
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