Appeal No. 1997-3060
Application No. 08/181,833
language. Claim 1 requires a “set of first signal
input/output ports” [emphasis ours]. It also requires that
the branch telephone exchange be operative to provide a
connection between the second input/output ports “and one of
the first input/output ports” [emphasis ours]. From our
reading of Bendixen (see column 2, lines 47-53), it appears
that once a unit is placed in communication with the
transceiver, “any other unit attempting to use the system to
initiate communication via the transceiver will receive a busy
signal from the control unit indicating that the system...is
not currently available.” Accordingly, it seems that there is
only one channel, or a single first input/output port in
Bendixen. If so, Bendixen does not have the plurality of such
first input/output ports required by the claim.
Moreover, according to claim 1, each building has a
telephone-type instrument connected, via a signal conveying
means, with one of the second input/output ports and that
signal conveying means must include a pair of signal
conductors as well as a wireless signal transmission path.
Even if we accept the examiner’s interpretation that Bendixen
shows such a signal conveying means on the left side of the
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