Appeal No. 97-1037
Application 08/467,869
The minimum values similarly call for an intermediate layer 2 and
film 3 thinner than each metal sheet. Of particular interest, is
the clear indication by Niwa (column 6, lines 40 through 45) of a
conventional form of damper wherein a sheet form of rubber is
interposed between steel sheets with the use of polyethylene
resin.
The British document (page 2, lines 13 through 26)
teaches a vibration damping device having rubber material
vulcanized to and sandwiched between metal plates. The document
expressly indicates (page 2, lines 27 through 31) that
the thickness of the mixture of rubber and
extract between the two relatively rigid
structures may be determined by the man
skilled in the art depending on the par-
ticular purpose for which the device is to be
used, and the known principles governing the
constructions of vibration damping devices of
this type.
In applying the test for obviousness, we reach the 6
conclusion that it would have been obvious to one having ordinary
6The test for obviousness is what the combined teachings of
references would have suggested to one of ordinary skill in the
art. See In re Young, 927 F.2d 588, 591, 18 USPQ2d 1089, 1091
(Fed. Cir. 1991) and In re Keller, 642 F.2d 413, 425, 208 USPQ
871, 881 (CCPA 1981).
8
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