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

Trademarks

Industrials and Manufacturing

Fourth Circuit Reversal Secured in Copyright Fair Use Appeal

Copyrights

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

Trademarks

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

Trademarks

Professional Services

Honeywell Prevails in Contested Domain Name Dispute

Trademarks

Industrials and Manufacturing

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

Trademarks

Consumer Goods

Mediation Success Brings About Quick Resolution of Litigation

Trademarks

Consumer Goods

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

Trademarks

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

Patents

Artificial Intelligence

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

Patents

Computers and Technology

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

Patents

Medical Devices

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

Patents

Computers and Technology

Leason Ellis attorney acts as expert witness for the Justice Department

Expert Testimony in Complex IP Disputes

Medical Devices

GeoSurveys.: Patent and copyright due diligence, acquisition, and assignment (geospatial survey data collection and analysis)

Patent Preparation, Filing, and Prosecution

Beauty Bomb Aesthetics: trademark infringement counseling and enforcement (boutique medical spa)

Patent Preparation, Filing, and Prosecution

Mountain Province Diamond: Pre-suit patent enforcement defense (website design functionality)

Patent Preparation, Filing, and Prosecution

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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