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United States of America Patent
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Mar 11, 2003
Grant Date -
N/A
app pub date -
Nov 30, 1998
filing date -
Nov 1, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A measuring device for determining the thickness of a non-homogeneous medium such as the thickness of a road structure. The device includes a radar transmitter and two spaced receivers. Information on the timing of the transmitted signal as well as the signals received by the two receivers is used to calculate the material thickness while eliminating signal drift.
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