DYK, Circuit Judge.
Appellant Trans Texas Holdings Corp. ("Trans Texas") appeals the decision of the Board of Patent Appeals and Interferences ("Board") in Reexamination Nos. 90/005,841 and 90/005,842. The Board affirmed the examiner's rejection of all of the claims of U.S. Patent No. 5,832,461 (filed Oct. 23, 1991) ("'461 patent") and U.S. Patent No. 6,052,673 (filed Nov. 2, 1998) ("'673 patent") as obvious under 35 U.S.C. § 103. We affirm.
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