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

Trademark

Industrials and Manufacturing

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

Copyright

Medical Devices

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

Patent

Transportation and Aerospace

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

Copyright

Transportation and Aerospace

Patent Prosecution for Drone Technologies

Patent

Industrials and Manufacturing

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

Patent

Computers and Technology

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

Patent

Artificial Intelligence

Leason Ellis Secures TTAB Cancellation of Infringing BENDIX Trademark Registrations

Trademark

Transportation and Aerospace

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

Trademark

Hospitality

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

Trademark

Transportation and Aerospace

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

Copyright

Computers and Technology

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

Trademark

Industrials and Manufacturing

Fourth Circuit Reversal Secured in Copyright Fair Use Appeal

Copyright

Media, Arts, and Entertainment

Trial Victory Secured in Bet-the-Company IP Dispute for Software Company in the Southern District of New York

Litigation

Computers and Technology

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

Trademark

Leason Ellis Secures $5M+ Judgment Including Treble Damages in Trademark Infringement Case in the Eastern District of New York

Trademark

Professional Services

Honeywell Prevails in Contested Domain Name Dispute

Trademark

Industrials and Manufacturing

Second Circuit Win Absolves Leason Ellis Clients of Liability for Trademark Infringement

Trademark

Consumer Goods

Mediation Success Brings About Quick Resolution of Litigation

Trademark

Consumer Goods

Success in an Ex Parte Appeal of a Refusal to Register a Trademark

Trademark

Consumer Goods

Leason Ellis Vindicates Non-Infringement of Trademark for Fragrances in Settlement of Litigations in Indiana and New York

Litigation

Consumer Goods

Leason Ellis at the Federal Circuits Defeats Challenge to the Inventorship of Client's Patent

Litigation

Consumer Goods

Melvin Garner Helps Client Restore its Amazon Marketplace Listing

Litigation

Consumer Goods

Leason Ellis Overcomes Ineligible Subject Matter Rejections in the PTO to Obtain Patents on AI-Directed Solar Power Generation

Patent

Artificial Intelligence

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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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About
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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
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