Vague Claim Construction Rules Lead to Reversals

Why can't federal trial judges figure out what patents mean? As it held en banc in <i>Cybor Corp. v. FAS Technologies, Inc.</i>, 138 F3d 1448 (Fed. Cir. 1998), district court rulings on claim construction &mdash;interpretations of the meaning of patent claims &mdash; are reviewed de novo as questions of law by the U.S. Court of Appeals for the Federal Circuit. A recent study concluded that more than 40% of all claim construction rulings reviewed by the Federal Circuit in 2001 were reversed in whole or part. Andrew T. Zidel, "Patent Claim Construction in the Trial Courts: A Study Showing the Need for Clear Guidance from the Federal Circuit," 33 Seton Hall L. Rev. 711 (2003).

14 minute read August 01, 2003 at 01:10 PM

By

Lewis R. Clayton