Communication system
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United States of America Patent
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-
Sep 8, 1992
Grant Date -
N/A
app pub date -
Jun 14, 1990
filing date -
Jul 6, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A communication system receives data from a portable device without using a conductor. The data-receiving side obtains electric power from the outside. The portable device obtains electric power from its internal power supply or the data-transmitting side.
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