Appeal No. 95-3913
Application 07/910,219
particular, Coviello teaches in column 12, lines 6-38, with
reference to Figure 9 that if the user of station set 1
originates an intercom call in the key telephone system, the call
originates on the "A" path of station set 1. The logic circuit
of station circuit 10' associated with station set 1, controls
switching circuit A which connects an idle link circuit, link1 -
link J. Coviello further discloses that the identity of the
called party is passed to the common register circuit 1050 which
controls the "B" path from the seized link circuit to connect in
switching circuit B to the "B" path of the called telephone.
We find that Coviello teaches a switching system, switching
circuit A and switching circuit B, coupled separately to each of
the terminals, station sets 1-N, for switching communication
paths among the terminals, telephone station sets 1-N, as recited
in Appellants' claim 1. Coviello teaches a signal generated by
the telephone station set when the user presses the intercom
button 31 shown in Figure 7. In addition, Coviello teaches a
notification signal that represents the identity of the called
party that is passed to register 1050. Therefore, we find that
Coviello teaches "a press-talk trunk coupled to receive the
6
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