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Key contacts
Managing Partner: Denise De Mory
Quick facts
Partners

15

Other qualified practitioners

10

Total number of lawyers

27

Practitioners (worldwide)

27

Languages

English, Spanish, Mandarin, Taiwanese

Key practice areas
Patent
Firm overview

Bunsow De Mory is a leading IP litigation and trial boutique firm based in Silicon Valley with an additional office in northern Virginia. The firm’s recent victories have firmly cemented its position as one of the country’s elite patent trial firms.

Bunsow De Mory succeeds because of its singular focus: unwavering commitment to achieving its client’s goals, even against the odds. Firm lawyers don’t shy away from the most difficult challenges against the biggest technology companies in the world. They thrive on them.

The firm focuses on plaintiff-side patent cases, where clearing the hurdles to get to trial is rare, and winning at trial is even rarer. Yet, Bunsow De Mory continues to defy the odds, securing more than $250 million in verdicts and settlements in the last two years alone.

Bunsow De Mory PTAB’s practice is second to none. Based on empirical studies of PTAB results, Patexia recently ranked Bunsow De Mory as the best performing law firm at the PTAB from July 2020 to June 2025.

The firm works on matters across a range of technologies and industries, including mobile automotive, telecommunications, artificial intelligence, fintech, and life sciences.

Legal experts have recognized the firm’s excellence. In addition to its recognition as a Highly Recommended firm by IP Stars and Managing IP, the was also listed in the Chambers USA guide for intellectual property—patent litigation and in Benchmark Litigation as a recommended firm.

Practice Areas & Sector Specialisations

Key IP Areas:

Copyright Intellectual property (contentious), Patent (contentious),  PTAB litigation, Trade mark (contentious)

Key Sector Expertise

Artificial intelligence, Automotive, Banking, Biotechnology, E-commerce, Electrical, Electronics, Optics & photonics, Semiconductors, Technology hardware,  Telecommunication

Address:
701 El Camino Real
Redwood City, CA 94063
United States
Tel:+1 650 351 7248 Fax:+1 415 426 4744 Email:Contact Us Web Address:https://www.bdiplaw.com/
Overview
Based in California, Bunsow De Mory is a renowned patent litigation boutique. The firm was founded by Henry Bunsow and current managing partner Denise De Mory, and is further made up of seven partners and staff. The team has deep specialization in patent disputes across fora, and also boasts expertise in trade secrets. Key industries for the firm are automotive, ssemiconductor, artificial intelligence, fintech, life sciences and telecommunications.

Notable IP practitioners: Henry Bunsow, Denise De Mory
Testimonials

2026

"Their team is one of the best claimant-side IP litigation and trial teams. Their experience, pragmatism, dynamism, and creativity is second to none if you want to take on well resourced defendants and the leading defense firms from filing all the way through trial and appeals. They are also excellent as a strike force when you need a firm to come in to handle or support on discovery, experts, and/or trial."

"Their team is efficient and very knowledgeable regarding patent litigation, especially plaintiff's side litigation and strategy."

"Bunsow De Mory combines strong patent litigation fundamentals with sound strategic judgment and commercial awareness. They quickly grasped both the technical and business context of the portfolio, remained senior-led, and provided pragmatic, efficient guidance throughout the litigation."

"Bunsow De Mory demonstrated strong technical fluency, strategic discipline, and responsiveness. They approached the matters with thoughtful preparation and alignment to our broader enforcement objectives, which was valuable even though the cases resolved prior to trial."

"Michael Flynn O'Brien in particular, along with Denise De Mory have exceptional trial skills and are able to translate complicated IP matters into easily digestible basics that can be understood and followed by a jury."

"Although our work was litigation-focused, Bunsow De Mory’s IP filing and administration approach is clearly strategy-driven, technically rigorous, and aligned with long-term enforcement considerations rather than routine portfolio maintenance."

"They approach prosecution strategically, with enforcement and monetization in mind. The team is technically strong, responsive, and disciplined in managing the portfolio."

"Their IP advisory team provides pragmatic, business-oriented guidance grounded in real litigation experience, helping align portfolio strategy, risk, and enforcement objectives in a commercially sensible way."

"They provide commercially pragmatic IP advice informed by real enforcement experience. Their guidance is strategic, candid, and aligned with business objectives."

"They are outstanding at providing informed and smart advice, in addition to the nuts and bolts of litigation."

Denise De Mory

"Denise is an outstanding strategist, litigator, and trial lawyer and advocate. She's the whole package. It's a combination that few can master, and she has few peers. She also is a tireless worker and fighter for her clients. You want her in your corner."

"Denise De Mory excels at strategic judgment, early case assessment, and aligning patent litigation strategy with commercial objectives. She is hands-on, decisive, and highly effective at simplifying complex issues for practical decision-making."

"Denise demonstrated excellent strategic judgment, strong technical command, and a practical, commercially aligned approach to complex patent matters."

Mike Flynn-O'Brien

"Mike is able to run the day-to-day of a case as well as provide creative guidance and strategy."

 

2025

"Excellent and thoughtful partners."

"Great written work."

"Strong research."

"Good organization of teams."

Linked Reviews
Patent

The firm represented VideoLabs in federal court against Dell Technologies regarding three video coding patents. The team secured a favorable settlement on behalf of Videolabs in January of 2024.

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