90 S.Ct. 305 (footnote omitted).
Finally, in
Sakraida v. Ag Pro, Inc.,
425 U.S. 273, 96 S.Ct. 1532, 47 L.Ed.2d 784 (1976), the
Court derived from the precedents the conclusion that when a patent “simply arranges old elements with each performing the same
function it had been known to perform” and yields no more than one would expect from such an arrangement, the combination is
obvious.
Id.,
at 282, 96 S.Ct. 1532.
[1] The principles underlying these cases are instructive when the question is whether a
patent claiming the combination of elements of prior art is obvious. When a work is available in one field of endeavor, design
to combine the known elements in the fashion claimed by the patent at issue. To facilitate review, this analysis should be made
explicit. See
In re Kahn,
441 F.3d 977, 988 (C.A.Fed.2006) (“[R]ejections on obviousness grounds cannot be sustained by mere
conclusory statements; instead, there must be some articulated reasoning with some rational underpinning to support the legal
conclusion of obviousness”). As our precedents make clear, however, the analysis need not seek out precise teachings directed to
the specific subject matter of the challenged claim, for a court can take account of the inferences and creative steps that a person
mandatory formulas; and when it is so applied, the TSM test is incompatible with our precedents. The obviousness analysis cannot
be confined by a formalistic conception of the words teaching, suggestion, and motivation, or by overemphasis on the importance
of published articles and the explicit content of issued patents. The diversity of inventive pursuits and of modern technology
counsels against limiting the analysis in this way. In many fields it may be that there is little discussion of obvious techniques or
combinations, and it often may be the case that market demand, rather than scientific literature, will drive design trends. Granting
be proved obvious is by noting that there existed at the time of invention a known problem for which there was an obvious solution
encompassed by the patent’s claims.
[5] The first error of the Court of Appeals in this case was to foreclose this reasoning by
holding that courts and patent examiners should look only to the problem the patentee was trying to solve. 119 Fed.Appx., at 288.