About Leason Ellis

Applied Insight®, Real Results

Leason Ellis is a full-service IP law firm that turns deep legal insight into commercially sound, forward-looking, and outcome-driven guidance. With a fresh, personalized approach, we help clients navigate complexity, make confident decisions, protect their ideas, and realize the full value of their IP.

Trained at some of the country’s top law firms, our team brings deep experience and sharp legal acumen to every IP challenge. Mid-sized by design, we consistently rank among the top IP firms in industry directories, such as IAM1000 and WTR. Global brands, innovative startups, and AmLaw firms trust us to navigate IP matters with insight and precision across the full lifecycle of protection, enforcement, and commercialization.

As a full-service intellectual property firm, we provide comprehensive guidance across all areas of IP, including patent, trademark, copyright, trade secrets, transactions, litigation and enforcement, and IP due diligence.

IP boutique Leason Ellis is one of New York’s very best trademark practices. With tactical finesse, fearless strategy and a collaborative, team-oriented style, the ensemble delivers top-notch brand advice that runs the gamut, from global portfolios to full-scale litigation. In the words of patrons, the trademark and copyright practice group ‘is full of highly trained specialists who hold themselves to a very high standard.'
WTR 1000, World Trademark Review
With a “solid bench of personable attorneys,” Leason Ellis stands out for its blend of sophistication and approachability. The team dives deep into the nuances of trademark law, connecting legal precision with brand strategy. Their sharp eye for detail and collaborative spirit infuse every matter with care and commercial impact.
WTR 1000, World Trademark Review
Leason Ellis is a go-to firm for patent drafting as well as patent litigation. Its practitioners have the ability to understand the strategic importance of patent portfolios from a business perspective, creating significant added value over law outfits that do not look beyond the technical and legal aspects of patents. They have an excellent work ethic, deliver on time every time and genuinely have their clients’ business interests at heart.
WTR 1000, World Trademark Review (2026)

18+

Years of bringing clarity and strategy to intellectual property law.

10,000+

Patents issued with Leason Ellis as counsel of record.

500+

Conflict matters litigated by Leason Ellis.

Insights
into Action

Whether you are protecting a breakthrough invention, building a global brand, or navigating a complex dispute, the right IP strategy can be the difference between leading your market and losing ground to competitors. At Leason Ellis, we translate legal complexity into clear, commercially sound guidance — so you spend less time managing risk and more time driving growth. The result is IP that works as hard as you do.

Learn why Leason Ellis should be your IP counsel

Our
IP Services

We partner with top-tier law firms worldwide and US-based companies and counsel to provide business-first IP advice that’s clear, defensible, and aligned with your organization’s risk profile and commercial strategy. We provide end-to-end IP support, from prosecution and portfolio management to enforcement, licensing, and strategic advisory. Whether you need formal opinions, practical day-to-day guidance, or support navigating litigation or commercialization, we act as an extension of your team, protecting your IP and positioning it to drive growth.

Learn more about our services

Who
We Help

We advise Fortune 100 companies, mid-sized enterprises, startups, inventors, and entrepreneurs alike, providing strategic guidance and safeguarding IP rights across the U.S. and internationally. Many global companies rely on us to represent their interests here, and foreign law firms trust us as their partner in the U.S.

Discover how we deliver results