Position monitoring device
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United States of America Patent
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Apr 21, 2009
Grant Date -
Apr 6, 2006
app pub date -
Sep 6, 2005
filing date -
Sep 20, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The invention relates to a position monitoring device for establishing the position of a first part with respect to a second part, having a transceiver at the first part for emitting an interrogation signal and for receiving a response signal that can be emitted in reaction to the interrogation signal by a transponder, wherein a screen that attenuates signals between the transponder and the transceiver is provided, two members of the group consisting of the transceiver, the screen and the transponder being movable relative to one another.
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