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  • Patent Reissue Breadth Anchored to Previous Markman Construction

    CAFC Decides Patent Reissue was Improperly Broadened Based on Previous Markman Definition Yesterday, in ArcelorMittal France v. AK Steel Corp. (CAFC 2015), the CAFC considered the impact of a reissue of U.S. Patent 6,296,805 on a previous appeal decision.  The '805 patent, directed to rolled steel, recited the claim limitation "very high mechanical resistance."  In an earlier...

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