Appeal No. 2002-1318
Application No. 08/693,662
With respect to independent claims 1, 3, and 5, each of the
claims recites that the sensed data signal is propagated from the
first power line without the use of an RF transmitter on the
first power line. However, appellants assert (brief, page 5)
that “the present invention accomplishes the same task as West in
view of Downey without the use of an RF transmitter by exploiting
the unintended and undesirable radio frequency propagation
generated by the high-frequency data signals being transmitted
over power lines.” From this statement of appellants, we find
that when transmitting a high frequency data signal over power
lines, that an unintended and undesirable radio signal is
propagated, without the use of an RF transmitter. Appellants
further assert (brief, page 6) that “the present invention
relates to a network of power lines where it would be difficult
and/or detrimental to directly couple data signals transmitted on
one power line onto another power line. A typical solution to
this problem is the use of an RF transmitter, which the present
invention eliminates.” From this statement of appellants, we
find that it was typical in the art to solve the problem relating
to the difficulty of couple signals from one power line to
another line, by using an RF transmitter. In addition,
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