Account

Sign in to access your account and subscription

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
Vague Claim Construction Rules Lead to Reversals

Why can't federal trial judges figure out what patents mean? As it held en banc in Cybor Corp. v. FAS Technologies, Inc., 138 F3d 1448 (Fed.

This premium content is locked for LawJournalNewsletters subscribers only

ENJOY UNLIMITED ACCESS TO THE SINGLE SOURCE OF OBJECTIVE LEGAL ANALYSIS, PRACTICAL INSIGHTS, AND NEWS IN LawJournalNewsletters

  • Stay current on the latest information, rulings, regulations, and trends
  • Includes practical, must-have information on copyrights, royalties, AI, and more
  • Tap into expert guidance from top entertainment lawyers and experts

Already have an account? Sign In Now

For enterprise-wide or corporate access, please contact Customer Service at [email protected] or call 1-877-256-2473.

NOT FOR REPRINT

© 2026 ALM Global, LLC, All Rights Reserved. Request academic re-use from www.copyright.com. All other uses, submit a request to [email protected]. For more information visit Asset & Logo Licensing.

Continue Reading

The Copyright Royalty Board (CRB), which works under the umbrella of the Librarian of Congress, sets statutory-license royalty terms and rates. The U.S. Courts of Appeals for the D.C. Circuit recently issued two notable decisions about the CRB.

October 01, 2026