BISSELL, Circuit Judge.
Mainland Industries, Inc. (Mainland) appeals from the judgment of the United States District Court for the District of Oregon, No. Civ. 81-928-BE which found the U.S. patents Nos. 3,190,326 ('326) and 3,282,312 ('312) of Standal's Patents Ltd. not invalid, enforceable and infringed by Mainland's chipper machines, cutters and knives. We affirm.
BACKGROUND
Procedure
Mainland filed a declaratory judgment action...
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