Expert Witness Blog
In Uniloc USA, Inc. v. Microsoft Corp., 632 F.3d 1292 (Fed. Cir. 2011), the Federal Circuit issued a landmark Daubert ruling that fundamentally changed how Computers & Technology Expert Witness damages testimony is evaluated in patent litigation. The decision vacated a $388 million verdict and rejected one of the most widely used royalty-rate methodologies in the technology industry.
Background and Parties
Uniloc USA, Inc. owned U.S. Patent No. 5,490,216, directed to a software-based product activation method designed to deter unauthorized copying. Uniloc sued Microsoft Corporation, alleging that Microsoft’s Product Activation feature in Windows XP and Office product lines infringed the asserted claims. The case proceeded to a jury trial in the District of Rhode Island, where the jury found infringement and awarded Uniloc approximately $388 million in reasonable royalty damages.
Role and Methods of the Computers & Technology Expert Witness
Uniloc’s damages expert applied the so-called “25 percent rule of thumb”—a longtime shortcut in technology licensing that assumes a reasonable royalty equals 25% of the licensee’s expected profits on the patented feature. The expert’s analysis included:
– Identification of Microsoft’s revenues and profits attributable to the accused activation feature.
– Application of the 25% rule to derive a baseline royalty rate.
– Adjustments under the Georgia-Pacific factors to account for case-specific licensing considerations.
The expert also performed a “check” against the royalty figure using the entire-market-value rule, a methodology that calculates damages as a percentage of the total accused product’s sales rather than the value of the patented feature alone.
Court’s Daubert and Reliability Analysis
The Federal Circuit conducted a thorough Daubert analysis and held that the 25% rule was inadmissible as a basis for damages testimony. The court’s reasoning was unequivocal:
– The 25% rule is a generalization not tied to the specific facts of the case at hand.
– It fails to apportion damages between the patented feature and unpatented elements of the accused product.
– It does not satisfy the requirement that expert testimony rest on sufficient facts or data and on a reliable methodology applied to those facts.
The court further held that Uniloc’s check against the entire-market-value rule was independently improper, because Uniloc had not shown that the patented feature created the basis for customer demand for Microsoft’s products.
Impact on the Outcome
The Federal Circuit vacated the $388 million damages award and remanded for a new trial on damages. The decision effectively ended the use of the 25% rule of thumb in federal patent damages testimony, requiring experts to ground royalty calculations in case-specific economic and licensing evidence.
For Computers & Technology Expert Witnesses, Uniloc v. Microsoft is a touchstone authority. Damages opinions in patent cases must now reflect specific licensing comparables, technically grounded apportionment, and economically rigorous Georgia-Pacific analysis. The decision continues to shape Daubert practice in software, semiconductor, and broader technology litigation more than a decade after it was issued.