Law.com Subscribers SAVE 30%

Call 855-808-4530 or email [email protected] to receive your discount on a new subscription.

Vague Claim Construction Rules Lead to Reversals

By Lewis R. Clayton
August 01, 2003

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. Cir. 1998), district court rulings on claim construction ' interpretations of the meaning of patent claims '  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). While other studies have reported lower numbers, this percentage is in line with a survey cited in Judge Rader's dissenting opinion in Cybor. Judge Randall R. Rader wrote then that a “reversal rate, hovering near 50%, is the worst possible. Even a rate that was much higher would provide greater certainty.”

Claim construction isn't easy ' particularly for a non-scientist '  and trial judges will never accumulate the patent law experience of judges on the Federal Circuit. Beyond these issues, however, are the Federal Circuit's rules of claim construction too confusing? Does the Federal Circuit tinker too much with lower court rulings, like a senior lawyer who rewrites everything he receives from an associate?

Read These Next
New York's Latest Cybersecurity Commitment Image

On Aug. 9, 2023, Gov. Kathy Hochul introduced New York's inaugural comprehensive cybersecurity strategy. In sum, the plan aims to update government networks, bolster county-level digital defenses, and regulate critical infrastructure.

The Bankruptcy Hotline Image

Recent cases of importance to your practice.

The DOJ's Corporate Enforcement Policy: One Year Later Image

The DOJ's Criminal Division issued three declinations since the issuance of the revised CEP a year ago. Review of these cases gives insight into DOJ's implementation of the new policy in practice.

How AI Has Affected PR Image

When we consider how the use of AI affects legal PR and communications, we have to look at it as an industrywide global phenomenon. A recent online conference provided an overview of the latest AI trends in public relations, and specifically, the impact of AI on communications. Here are some of the key points and takeaways from several of the speakers, who provided current best practices, tips, concerns and case studies.

CLE Shouldn't Be the Only Mandatory Training for Attorneys Image

Each stage of an attorney's career offers opportunities for a curriculum that addresses both the individual's and the firm's need to drive success.