PER CURIAM:
Appellants brought this action against two corporate defendants for infringement of United States Patent No. 3,219,099. The patent covers appellants' design for a small piece of laboratory equipment known as a rotary evaporator. The district court found the patent both invalid and not infringed; we affirm on the sole ground that the patent was invalid for obviousness under 35 U.S.C. § 103.
Appellants' rotary evaporator is superior to earlier...
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