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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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U.S. District Courts & ITC - Cherokee Gray Eagle IP v. CircusTrix (M.D. Fla)

Patents

U.S. District Courts - Cherokee Gray Eagle IP v. Sky Zone (M.D. Fla)

Patents

U.S. District Courts & ITC - Ajinomoto Co. v. Cheiljedang (S.D.N.Y.)

Patents

Leason Ellis Enforces Nourison's Rights Against Infringing Rug Sellers on Amazon in Declaratory Judgment Action in the Central District of California

Copyrights

Consumer Goods

Leason Ellis Enforces Copyright Portfolio for World’s Largest Lace Manufacturer Against Zara in Copyright Infringement Litigation and Secures Favorable Resolution

Copyrights

Consumer Goods

Leason Ellis Successfully Opposes Motion by Shein to Enforce Non Binding Settlement and Achieves Favorable Resolution for World’s Largest Lace Manufacturer in Copyright Infringement Litigation

Copyrights

Consumer Goods

Leason Ellis Reaches Favorable Resolution in Lanham Act Declaratory Judgment Action in the Eastern District of New York for the Popular Exhibition, Van Gogh: The Immersive Experience

Trademarks

Media, Arts, and Entertainment

Leason Ellis Attorney serves as an expert on the management of IP

Expert Testimony in Complex IP Disputes

Consumer Goods

Leason Ellis Leads Worldwide Trademark Enforcement and Anti‑Counterfeiting Initiatives for a Turbocharger Technology Company

Trademarks

Industrials and Manufacturing

Leason Ellis Secures Dismissal of All Claims Against Air Purification Technology Company in the Southern District of New York

Trademarks

Consumer Goods

Cancellation Settles After Summary Judgment Motion Showing Non-Abandonment of Clothing Trademark

Trademarks

Consumer Goods

Leason Ellis Successfully Defended Trademark and Patent Case in Multi-District Dispute

Trademarks

Computers and Technology

Thoughtful Motion Practice Leads to Settlement of Trademark Opposition

Trademarks

Consumer Goods

Multi-forum Trademark Dispute Results in Confidential Settlement Allowing Flux Manufacturer to Retain Trademark

Trademarks

Industrials and Manufacturing

Leason Ellis Defends Medical and Wellness Device Manufacturer Against Claims of Copyright Infringement and Reaches Favorable Settlement

Copyrights

Medical Devices

Leason Ellis Secures Design and Utility Patent Portfolio Covering Motorized Fitness Wheel

Patents

Transportation and Aerospace

Leason Ellis Secures Dismissal of Third Party Complaint Against Towing and Trailer Parts Manufacturer in District of New Jersey

Copyrights

Transportation and Aerospace

Patent Prosecution for Drone Technologies

Patents

Industrials and Manufacturing

Leason Ellis Patents Advancements in Ultrasonic Probes for Saudi Arabian Oil Company

Patents

Computers and Technology

Leason Ellis Obtains Patents for Morgan Stanley to Enhance Presentations and Videos by Adding Media using Generative Artificial Intelligence

Patents

Artificial Intelligence

Leason Ellis Secures TTAB Cancellation of Infringing BENDIX Trademark Registrations

Trademarks

Transportation and Aerospace

Leason Ellis Protects the Legacy of a Civil Rights Icon, Mr. G, in Trademark Dispute

Trademarks

Hospitality

UDRP Win: Leason Ellis Returns Domain Name garrettmotioneu.com to Garrett Transportation I Inc.

Trademarks

Transportation and Aerospace

Leason Ellis Conducts IP Due Diligence and Advances Seller Favorable Terms in a Major Corporate Transaction

Copyrights

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
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Professionals
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Representative Work Firm Accolades
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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
Copyrights Litigation Patents Trade Secrets Trademarks Transactions
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