Wireless communications system
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United States of America Patent
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app pub date -
Jul 23, 2003
filing date -
Nov 1, 2002
priority date (Note) -
Abandoned
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Abstract
A microwave communications system enhances microwave wave propagation in tunnels, mines and the like by transmitting and receiving communications signals at frequencies ranging from 5 GHz to 15 GHz. Duplex transmissions and call signal alarm functionality provide enhanced safety features for workers.
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