PELL, Circuit Judge.
Wolens appeals from the district court's judgment, following a full hearing, that two models of popcorn poppers manufactured by Wear-Ever Aluminum, Inc. and sold by the other named defendants do not infringe his patented hot-air popper. The defendants cross-appeal from the district court's holding that the Wolens patent was neither obvious nor anticipated by the prior art and is therefore valid.
I. FACTS
A. The Plaintiff...
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