Appeal No. 2002-0859
Application 09/193,444
In re Gartside, 203 F.3d 1305, 1316, 53 USPQ2d 1769, 1776 (Fed.
Cir. 2000). “The Board’s findings must extend to all material
facts and must be documented on the record, lest the ‘haze of so-
called expertise’ acquire insulation from accountability.” Lee,
277 F.3d at 1345, 61 USPQ2d at 1435.
We find that Tubel’s Figure 9 is a block diagram of an
exemplary downhole network. Each downhole control system 22 is
connected to a network 410. The network 410 is implemented using
cable or wireless communications. A bus master 400 monitors the
network traffic on the network 410. The bus master 400 will
arbitrate between various downhole control systems to prevent
data collision. See column 20, lines 9 through 39. Thus, Tubel
teaches a bus communication system where the bus master 400
controls the communication between each of the nodes 22 connected
onto the bus 410. We fail to find that Tubel teaches any need
for the redundancy of the bus 410. In fact, Tubel teaches the
use of a wireless bus which would not require redundancy.
Gerstel, on the other hand, teaches a Fault-Tolerant
Multichannel Multiplexing Ring Configuration. See column 1,
lines 1 through 19. Gerstel is dealing with the problem of how
to handle failures in a ring network. See column 1, line 20,
through column 2, line 7. We fail to find anything in Gerstel
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