Appeal No. 2000-2253 Page 4
Application No. 08/798,137
Cir. 1993) (citing In re Zletz, 893 F.2d 319, 321, 13 USPQ2d 1320, 1322 (Fed. Cir.
1989)).
Here, independent claim 1 specifies in pertinent part the following limitations:
"the system operates in a first mode, in which each device transmits signals to the
satellite at a first carrier bandwidth and receives signals from the satellite at a second
carrier bandwidth, and selectively operates in a second mode, in which each device
transmits signals to the satellite and receives signals from the satellite at the first carrier
bandwidth." Similarly, independent claim 8 specifies in pertinent part the following
limitations: "establishing, in a first mode of operation, a first communication link
between a first communication device, a satellite, a control station associated with the
satellite, and a second communication device, the first communication device
transmitting signals to the satellite at a first carrier bandwidth and the second
communication device receiving signals at a second carrier bandwidth; [and]
establishing, in a second mode of operation, a second communication link between the
first communication device, the satellite, and a second communication device, the first
communication device transmitting signals to the satellite at the first carrier bandwidth
and the second communication device receiving signals from the satellite at the first
carrier bandwidth.” Similarly, independent claim 14 specifies in pertinent part the
following limitations: "a first receiver path for receiving communication signals from a
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