Jones Day is home to a robust patent litigation practice group, recognised for its strong record in technology and life sciences patent disputes, as well as high post-trial success rate. The firm boasts a deep bench of first-chair IP litigators with technical knowledge and experience across administrative tribunals and trial and appellate courts. Anthony Insogna, global IP practice head based in San Diego, is reputed for his work in life sciences patent litigation. Practice co-head David Maiorana, operating out of Cleveland, is a first-chair trial attorney with extensive experience in handling multi-forum patent litigation. Atlanta-based co-head Ryan Walsh is a go-to person for patent infringement litigation and IP rights enforcement. Michael Hendershot is an established California IP first-chair trial lawyer with background in biomedical engineering. Edward Reines and Derek Walter, prominent patent attorneys in the life sciences sector, have joined the firm from Weil, Gotshal & Manges LLP in March 2025. Sarah Geers is another notable name in the life sciences litigation, visible in high-stakes IP disputes.
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Client satisfaction: Lawyer & team quality
Client satisfaction: Sector knowledge
Testimonials
Collated independently by Legal 500 research team.
‘Mike Hendershot is one of the best attorneys I've every encountered. He goes the extra mile to understand our business and perspective and adapts his counsel to our specific needs and risk tolerance.'
‘Sasha Mayergoyz is highly intelligent, punctual, and responsive to client needs/quirks. He is a strong strategic thinker and excellent case manager.'
- 'Greg Lanier knows how to read the judge he's in front of, every time, no matter the venue -- a talent that is hard to quantify but greatly valued. He is also very hands on as a first chair throughout the litigation, beginning to end.’
‘The team at Jones Day is exceptional. They are the only ones we use for intellectual property as they know the field extremely well. We have been using them since the inception of the company in 2011 and have been very happy clients.’
‘Michael Hendershot is an exceptional patent attorney who is leader of the team with great advocacy and presentation skills, ability to grasp complex ideas swiftly and getting to the point with best options tendered before client without evert being a legal academic in ivory tower for a lost client in any minute.’
‘This is a team of exceptional trial lawyers. They have been able to distill and effectively communicate extremely technical scientific information to the court in an extremely compelling manner. I've been impressed by their unyielding determination and resilience. I was blown away by their trial skills and their effective use of courtroom technology to support their arguments.’
Key clients
- BioMarin Pharmaceutical Inc.
- CareDx
- Google LLC
- Johnson & Johnson and DePuy Synthes
- Labcorp (Laboratory Corporation of America)
- Medtronic Corevalve, LLC
- Merck & Co.
- Parker Hannifin Corporation, et al.
- Puma Biotechnology, Inc.
- Qualcomm Incorporated
- R.J. Reynolds Vapor Company
- RAI Strategic Holdings, Inc.
Work highlights
Briefed and argued Medtronic’s appeal at the Federal Circuit, obtaining complete reversal of a $125 million patent-infringement judgment involving Medtronic’s Evolut™ replacement heart valves and their implantation method.
Wiped out a $20 million verdict against Johnson & Johnson subsidiaries DePuy Synthes Products, Inc. and DePuy Synthes Sales, Inc. (DePuy Synthes).
Obtained a rare general exclusion order at the final initial determination stage for R.J. Reynolds in a Section 337 patent infringement investigation before the ITC involving disposable vaporizers.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Practice head
Anthony Insogna; David Maiorana; Ryan Walsh
Other key lawyers
Michael Hendershot; Derek Walter; Sarah Geers; Edward Reines; Sasha Mayergoyz; Greg Lanier; Jennifer Bennet