Appeal No. 1999-0863
Application 08/674,727
DECISION ON APPEAL
This is a decision on appeal under 35 U.S.C. § 134 from
the final rejection of claims 10, 11, and 17-21.
We affirm-in-part.
BACKGROUND
The disclosed invention relates to a surface acoustic
wave (SAW) band-pass filter with a widened pass band.
Claim 17 is reproduced below.
17. A surface acoustic wave resonator filter
comprising:
a first longitudinal mode coupling type resonator
connected to an input terminal; and
a second longitudinal mode coupling type resonator
connected to an output terminal and acoustically coupled
to said first longitudinal mode coupling type resonator;
said first longitudinal mode coupling type resonator
and said second longitudinal mode coupling type resonator
each comprising interdigital electrodes, wherein at least
one of said interdigital electrodes of said first
longitudinal mode coupling type resonator and of said
second longitudinal mode coupling type resonator is a
dummy electrode, comprising electrically shorted
interdigital electrodes.
The Examiner relies on the following prior art:
Mitchell 4,178,571 December 11, 1979
Ehata 61-142812 June 30, 1986
(Japanese Kokai)
- 2 -
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 Next
Last modified: November 3, 2007