LAWYER PROFILE
Daralyn J Durie

Daralyn J Durie

USA 2026

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Ranked in 3 practice areas

About

Provided by Morrison Foerster

Practice Areas

Daralyn Durie is one of the nation’s preeminent trial lawyers with significant experience litigating high-stakes disputes on behalf of leading innovators in the technology and life sciences sectors.

Daralyn draws on decades of experience serving as lead counsel in complex matters and securing successful outcomes in major litigation. Her recent notable wins include securing a defense verdict for Aptiv in a hotly contested patent case and scoring three back-to-back wins in the first post-COVID in-person jury trials.

Daralyn acts as go-to trial counsel for both plaintiffs and defendants. She has obtained a plaintiff-side jury verdict of $178 million in a patent infringement case involving melanoma therapy, and she has led the enforcement of Genentech’s Cabilly family of patents, which generated billions of dollars in licensing revenue. Daralyn has also won defense verdicts in major cases involving copyright or trademark infringement claims for Google, Redbubble, and Activision Blizzard.

Chambers Review

Provided by Chambers

Chambers Guide to the USA

Life Sciences: IP/Patent Litigation - USA - Nationwide

Band 1
Band 1

Individual Editorial
Daralyn Durie is frequently called upon by leading life sciences companies to litigate major patent disputes.

Intellectual Property: Patent Litigation - California

Band 1
Band 1

Individual Editorial
Daralyn Durie is a widely respected patent litigator who is regularly called upon to represent high-profile Silicon Valley tech and pharmaceutical businesses in litigation throughout the US.

Intellectual Property - USA - Nationwide

Band 1
Band 1

Individual Editorial
Daralyn Durie maintains a leading practice in pharmaceutical and biosimilar patent litigation. She offers additional expertise in copyright infringement disputes.

Life Sciences: IP/Patent Litigation - California

Band 2
Band 2

Individual Editorial
Daralyn Durie is an esteemed patent litigator who regularly handles high-value infringement claims for life sciences companies as part of a wider disputes practice.

Strengths

Provided by Chambers

  • Daralyn is excellent counsel.

    Life Sciences: IP/Patent LitigationChambers Guide to the USA
  • Daralyn Durie is very sophisticated about the litigation process and can come up to speed on the commercial issues at play in the litigation.

    Intellectual Property: Patent LitigationChambers Guide to the USA
  • Daralyn is an excellent attorney.

    Intellectual Property: Patent LitigationChambers Guide to the USA
  • Daralyn Durie has a stellar reputation. We need more people like her in the field.

    Intellectual Property: Patent LitigationChambers Guide to the USA
  • Daralyn is an excellent attorney.

    Intellectual PropertyChambers Guide to the USA
  • Daralyn Durie has a stellar reputation. We need more people like her in the field.

    Intellectual PropertyChambers Guide to the USA

Ranked Individuals at Morrison Foerster (175)

California

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