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Federal Circuit Panel Once Again Splits on Claim Construction

Client Alert | 1 min read | 04.24.07

In Acumed LLC v. Stryker Corp. (No. 2006-1260, April 12, 2007), a Federal Circuit panel offers a split decision regarding the proper construction of a single term in the claims. According to the dissent, the district court used a dictionary as the starting point when defining each disputed term. Therefore, the dissent argues that the district court’s method actually led them astray from a proper claim construction. The majority counters by simply noting that a proper de novo review prohibits the court from considering the logic or definitions used by the lower court to reach the correct construction. Rather, the majority explains, “[w]e review only the district court’s finished product, not its process” and the unorthodox methods used by the district court during the Markman hearing are legally irrelevant.

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Client Alert | 6 min read | 11.26.25

From ‘Second’ to ‘First:’ Federal Circuit Tackles Obvious Claim Errors

Patent claims must be clear and definite, as they set the boundaries of the patentee’s rights. Occasionally, however, claim language contains errors, such as typographical mistakes or incorrect numbering. Courts possess very limited authority to correct such errors. The United States Court of Appeals for the Federal Circuit has emphasized that judicial correction is appropriate only in rare circumstances, where (1) the error is evident from the face of the patent, and (2) the proposed correction is the sole reasonable interpretation in view of the claim language, specification, and prosecution history. See Group One, Ltd. v. Hallmark Cards, Inc., 407 F.3d 1297, 1303 (Fed. Cir. 2005) and Novo Indus., L.P. v. Micro Molds Corp., 350 F.3d 1348, 1357 (Fed. Cir. 2003)....