Telecommunications – Transmitter and receiver at separate stations – Near field
Reexamination Certificate
2007-08-07
2007-08-07
Nguyen, Lee (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Near field
C455S011100, C455S066100, C455S101000, C455S133000
Reexamination Certificate
active
11083894
ABSTRACT:
A system and method communicate signals between a portable unit and a communications system. The portable device communicates with a base unit using inductive coupling. The base unit is further connected to a wider communication system such as a telephone network. Multiple, orthogonally arranged transducers are used in the base unit to provide a more complete magnetic field and to prevent mutual inductance nulls which are otherwise present in a magnetic field. The use of short-range inductive coupling minimizes the power requirements and limits interference with other sources. The inductive coupling may also be used to recharge a battery in the portable device.
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Butler Neal R.
Cobler Patrick J.
Palermo Vincent
Aura Communications, Inc.
Hamilton Brook Smith & Reynolds P.C.
Nguyen Lee
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