Appeal No. 2001-0379
Application No. 09/141,891 Page 11
(col. 8, lines 12-20); and stopping said gas mixture flow when
said temperature sensor detects a temperature rise in said cavity
(col. 8, lines 42-52). Thus, we affirm the obviousness rejection
of claim 11 over Cox, with Kern being cumulative. We note that
it is permissible to affirm a rejection relying on fewer
references than applied in the rejection. See In re Bush, 296
F.2d 491, 496, 131 USPQ 263, 266-67 (CCPA 1961).
We turn next to claim 12. Both appellant (brief, page 11)
and the examiner (answer, page 4) assert that neither reference
employs a flow meter. Although not brought to our attention by
either the appellant or the examiner, we find that Cox discloses
flow meter 28 which meters non-combustible gas from container 16,
which is delivered to tub 20 before being drawn out along with
the combustible gas mixture by pump 182 and transmitted to the
combustion chamber (col. 9, lines 7-17). Accordingly, the
rejection of claim 12 under 35 U.S.C. § 103(a) is affirmed.
We turn next to claim 13. The claim recites that the gas
mixture is ignited by an electronic ignition means. Both
appellant and the examiner are silent as to this limitation. We
find that Cox discloses a capacitor discharge power unit and
ignition coil assembly 50, an electronic ignition trigger
oscillator assembly (col. 3, lines 24 and 25). From Cox's
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