SCHALL, Circuit Judge.
Crater Corporation ("Crater") sued Lucent Technologies, Inc. and American Telephone and Telegraph Company (collectively, "Lucent") in the United States District Court for the Eastern District of Missouri alleging that Lucent infringed Crater's U.S. Patent No. 5,286,129 (the "`129 patent"). The `129 patent is directed to an underwater coupling device (the "Crater coupler"). Crater also alleged state-law claims against Lucent for breach of contract...
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