EUGENE A. WRIGHT, Circuit Judge.
We consolidated these appeals to consider two challenges to Patent No. 3,778,852 (air-frame water bed) held by Penn International Industries (Penn).
In No. 77-2142 Penn sued Pennington Corporation, a water bed manufacturer, and several of its retailers for infringement in District Court for the Northern District of California. Among its defenses, Pennington alleged that the patent was invalid for obviousness. The court found...
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