Opinion for the court filed PER CURIAM. Concurring opinions filed by Circuit Judge RADER, and Circuit Judge BRYSON in which Circuit Judge PAULINE NEWMAN joins.
PER CURIAM.
Seal-Flex, Inc. is the assignee of U.S. Patent Nos. 4,474,833 (the '833 patent) and 4,529,622 (the '622 patent). In 1991, Seal-Flex sued Athletic Track and Court Construction (AT & CC) in the United States District Court for the Eastern District of Michigan for infringement of both patents...
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