MEMORANDUM OPINION AND ORDER
JOHN R. TUNHEIM, District Judge.
Plaintiff Donlen Abrasives, Inc. ("Donlen") brought this patent infringement action against defendant Full Circle International, Inc. ("Full Circle"), alleging that Full Circle's Flex Edge drywall sanding device infringes two of Donlen's patents. Full Circle asserts counterclaims against Donlen for declaratory judgment of non-infringement and invalidity. Both parties now move for summary judgment...
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