NonObviousness: Analogous Arts Test Still Strong
Patent Law Blog (Patently-O):
Anderson v. Pella (Fed. Cir. 2008)(non-precedential)
Anderson sued Pella and WL Gore for infringement of its window screen patent. Apparently, the patented screen allows ventilation and blocks insects, but is easier to see through than traditional screens. The claims focus on the diameter and strength of the screen wires and as well as on the screen's "transmittance" and "reflectance" properties.
Prior to KSR, the district court had rejected the defendant's summary judgment motions on obviousness – finding that the prior art references lacked a motivation to combine. After KSR, the district court reversed course – this time granting summary judgment of invalidity based on obviousness of the claimed screen. In its analysis, the district court asked and answered the following question: "would an insect screen manufacturer of ordinary skill have found it obvious to use the [prior art] screening material, decrease its reflectance value, bond it, and place it in a window frame? The answer, plain and simple is 'Yes.'" According to the lower court, the prior art mesh was the "heart" of the claimed invention, and it was a "simple act of common sense" to slightly modify the mesh and apply it to a window. Although secondary factors of nonobviousness were shown, the lower court found they were not enough to rebut a strong showing of obviousness.
Analogous Arts: On appeal, the Federal Circuit vacated – finding material facts that prevent summary judgment of obviousness. In particular, the appellate panel found that the prior art mesh might not count as nonobviousness type prior art because it "outside the scope and content of the prior art." The court based its decision on three issues: (1) the prior mesh was not in the same "insect screen manufacturing field"; (2) there was some evidence that the prior mesh would…