DYK, Circuit Judge.
Airboss Railway Products, Inc., Airboss of America Corp., Robert M. Magnuson, and Jose R. Mediavilla (collectively, "the defendants") appeal from the judgment of the United States District Court for the Western District of Missouri. Pandrol USA, LP v. Airboss Ry. Prods., No. 99-0182 (W.D.Mo. Mar. 28, 2002).
The district court entered summary judgment of infringement of U.S. Patent No. 5,110,046 ("the '046 patent") and found that...
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