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Mary Prendergast

Partner | Washington, D.C.

I love diving deep into my client’s technology, while focusing on how to explain that technology in a way judges and juries can understand.


Represented a smartphone manufacturer in high-profile patent litigation that resulted in jury verdicts totaling over $1.1 billion.

(Northern District of California). Representing Teradata against SAP in complex litigation alleging misappropriation of trade secrets under the DTSA and California Civil Code, copyright infringement, and antitrust violations. Matter is pending.

(District of Delaware). Represented BASF in patent litigation involving materials used to catalyze and reduce NOx and NH3 oxidation in exhaust systems. Matter resolved due to favorable settlement.

(ITC, Inv. 337-TA-1059). Represented Nikon Corporation in an investigation alleging infringement of patents related to digital cameras. The case settled after trial on favorable terms.

(Central District of California). Represented Entrata Inc. in six-year-long trade secret, copyright, and antitrust dispute involving property management software. Case settled on favorable terms after jury selection.

(Central District of California). Represented several Alcon entities in patent litigation regarding femtosecond lasers for eye surgery. Prevailed on summary judgment that the three asserted patents were not infringed by the accused devices.

(International Trade Commission, 337-TA-994). Represented respondent BlackBerry in an ITC investigation involving a hierarchical user interface for accessing music tracks on portable media players. Obtained an early initial determination from the ALJ finding the asserted patent invalid under 35 U.S.C. § 101.

(Arbitration/Central District of California). Represented Alcon LenSx in a three-day patent infringement and licensing arbitration hearing involving laser-tissue interaction technology, resulting in a complete victory for Alcon LenSx that was confirmed by the district court and affirmed by the Federal Circuit.

(District of Massachusetts). Represented Nikon Metrology in a two-week jury trial in a patent case involving laser line scanner and articulated arm metrology solutions.

(Southern District of New York). Defended Nikon against patent infringement claims aimed at lithography machines used in fabrication of most of the large-panel LCD displays in the world, including drafting of summary judgment briefing that resulted in a judgment of invalidity on all asserted patents.

Ones to Watch: Intellectual Property

Best Lawyers 2021-2024

D.C. Rising Star

The National Law Journal 2021