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Representative Work

Results That Speak for Themselves

From complex patent litigation to global trademark strategies, our work spans industries, technologies, and legal challenges of every kind. Here, we share a selection of matters that reflect the creativity, precision, and commercial focus we bring to every engagement.
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Melvin Garner Serves as an Expert Witness on US Patent Law

Expert Testimony in Complex IP Disputes

Industrials and Manufacturing

Leason Ellis Acts as a Co-Counsel in a Litigation Brought by its client Brian Greenfield Against Mold-Rite Plastics

Litigation

Consumer Goods

Leason Ellis Attorneys Prepare and Submit Amicus Briefs on behalf of the NYIPLA

Litigation

Industrials and Manufacturing

Leason Ellis Settles Patent Infringement Cases Against its Client on Favorable Terms

Litigation

Consumer Goods

Leason Ellis Obtains High Tech Patents for Hong Kong University

Patent

Computers and Technology

Leason Ellis Obtains a Series of Patents on Disposable Handpieces for Cataract Surgery

Patent

Medical Devices

Leason Ellis Obtains Patents on Remote Control of the Lubrication of Rotating Machines

Patent

Computers and Technology

Leason Ellis attorney acts as expert witness for the Justice Department

Expert Testimony in Complex IP Disputes

Medical Devices

Leason Ellis Secures Trademark Registration for Configuration of Dots on Sensor Devices

Trademark

Computers and Technology

Leason Ellis Client Cellular Biomedicine Group Signs Major Worldwide Deal With Johnson & Johnson’s Janssen Biotech

Patent

Life Sciences and Pharmaceuticals

Court Credits Expert Testimony of "Pay-for-Delay" Case to Partner Michael Davitz

Expert Testimony in Complex IP Disputes

Life Sciences and Pharmaceuticals

Leason Ellis Enforces Insole Manufacturer’s Patent and Trade Dress Rights in the Eastern District of Texas and Achieves Confidential Settlement

Patent Litigation

Industrials and Manufacturing

Leason Ellis Secures Dismissal With Prejudice of Copyright Infringement Case in the District of New Jersey Against Infamous “Copyright Troll”

Patent Litigation

Industrials and Manufacturing

Leason Ellis Scores for Client in Patent Infringement Case

Patent Litigation

Consumer Goods

Southern District of New York Reinstates Misappropriation of Ideas Claim, Dismisses Certain of Defendants’ Defenses, and Awards Discovery Sanctions

Litigation

Consumer Goods

Leason Ellis Takes Over Defense of Multi-District Patent Infringement Litigation and Secures Summary Judgment and Attorney Fee Award

Post-Grant Patent Proceedings

Medical Devices

Leason Ellis Achieves Dismissal of Eight-Count Complaint for Lanham Act and Related NJ State Law Claims; Third Circuit Affirms on Appeal

False Advertising Litigation

Life Sciences and Pharmaceuticals

Leason Ellis Obtains Dismissal of Patent Infringement Claims

Post-Grant Patent Proceedings

Industrials and Manufacturing

Defending Trade Dress Infringement Action, Leason Ellis Leverages Victory on Motion to Dismiss Based on Lack of Personal Jurisdiction Into Settlement

Post-Grant Patent Proceedings

Industrials and Manufacturing

Leason Ellis Foils Another Domain Name Typosquatter

UDRP Proceedings

Industrials and Manufacturing

Leason Ellis Secures Domain Name Win for Client

Trademark Litigation

Computers and Technology

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What Others
Say Matters

The voices of our clients, industry peers, and leading legal organizations tell the story of our firm’s impact. Their recognition inspires us to keep raising the bar in client service and results.

  • 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)

  • Leason Ellis may be small, but it packs a powerful punch. By prioritising client needs and consistently exceeding expectations, it has become a go-to firm for all patent-related services.

    IAM Patent 1000

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Leason Ellis - Intellectual Property Lawyers Logo in White
Professionals
Tatsuya Adachi Melissa A. Alcantara Elizabeth M. Barnhard Kristin J. Breen Dexter Chang Susie S. Cheng Stacey W. Chung Lori L. Cooper* Ralph J. Crispino M. Diana Danca Michael A. Davitz Edward Ellis* Lauren B. Emerson Joel J. Felber* Matthew L. Frisbee Henry A. Gabathuler Stefanie M. Garibyan Jordan G. Garner Melvin C. Garner Vera Glonina Howard I. Grossman Sara E. Gruber Brian M. Gummow James F. Haley Mitsu Haraguchi Robert M. Isackson Marcus J. Jellen Kendra V. Johnson Cha Hyung (Catherine) Kim David Leason Michelle J. Levin Jia Li Erica S. Livingstone Karen Mangasarian Yuval H. Marcus Elyse Marcus Joshua J. Montgomery Anthony J. Natoli Cameron S. Reuber Emily A. Rice* Maha M. Saber Marlene U. Sauer Karin Segall Peter S. Sloane Audrey E. Trace* Taylor L. Vacala Yilan Wang Jarryd R. Werts
Services
Copyright Litigation Patent Trade Secret Trademark Transaction
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Professionals
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Representative Work Firm Accolades
Insights
About
Join
Contact
Tatsuya Adachi Melissa A. Alcantara Elizabeth M. Barnhard Kristin J. Breen Dexter Chang Susie S. Cheng Stacey W. Chung Lori L. Cooper* Ralph J. Crispino M. Diana Danca Michael A. Davitz Edward Ellis* Lauren B. Emerson Joel J. Felber* Matthew L. Frisbee Henry A. Gabathuler
Stefanie M. Garibyan Jordan G. Garner Melvin C. Garner Vera Glonina Howard I. Grossman Sara E. Gruber Brian M. Gummow James F. Haley Mitsu Haraguchi Robert M. Isackson Marcus J. Jellen Kendra V. Johnson Cha Hyung (Catherine) Kim David Leason Michelle J. Levin Jia Li
Erica S. Livingstone Karen Mangasarian Yuval H. Marcus Elyse Marcus Joshua J. Montgomery Anthony J. Natoli Cameron S. Reuber Emily A. Rice* Maha M. Saber Marlene U. Sauer Karin Segall Peter S. Sloane Audrey E. Trace* Taylor L. Vacala Yilan Wang Jarryd R. Werts
Copyright Litigation Patent Trade Secret Trademark Transaction
Artificial Intelligence Computers and Technology Consumer Goods Energy
Hospitality Industrials and Manufacturing Life Sciences and Pharmaceuticals Media, Arts, and Entertainment
Medical Devices Professional Services Transportation and Aerospace
China Japan
All Insights News Articles The Newtonian
About Leason Ellis Our Approach Our Culture Pro Bono & Community Engagement
Careers Why Join Us Current Opportunities