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Key practice areas
Trade mark
Patent
Patent prosecution
Trusted Talent
Firm overview

We do European Patent Prosecution, EPO Opposition, Unified Patent Court (UPC) Litigation, and Global Patent Strategy and Management.  

European Patent Prosecution

Our focus is drafting strong, enforceable patents for our clients before the European Patent Office (EPO) taking into account the United States Patent and Trademark Office (USPTO) requirements. Our prosecution team’s expertise ensures success in securing robust allowance before the EPO and USPTO. Our services include:

  • Drafting and filing patent applications that maximize claim scope and withstand EPO and USPTO scrutiny.
  • Overcoming Objections: responding to EPO office actions with persuasive arguments.
  • Strategic Portfolio Building: filing divisional applications and claim strategies to comprehensive protection aligned with your business goals.
  • Leveraging deep technical knowledge in fields like biotechnology, pharmaceuticals, medical devices, and mechanical engineering to win patents for cutting-edge inventions. Our decades of experience ensure we develop the patents that drive your success in the European market.

EPO Opposition

When it comes to EPO oppositions, we win, whether challenging competitors’ patents or defending your own.

Our services include:

  • Filing targeted oppositions to revoke or weaken competitors’ patents, securing your market position.
  • Defending your patents against opposition attacks, preserving their scope and enforceability.
  • EPO oral hearings.
  • Appealing before the EPO Boards of Appeal.

Our success rate in EPO oppositions reflects our commitment to winning outcomes that protect your rights and market.
 
Unified Patent Court (UPC) Litigation

In the Unified Patent Court (UPC), we handle cross-border patent disputes . Our services include: 

  • Infringement: In collaborating with national litigants, we secure injunctions, damages, and other remedies through aggressive enforcement of your patents in UPC proceedings.
  • We invalidate: we challenge or defend patent validity, winning outcomes that strengthen your portfolio or neutralize infringement threats.
  • Cross-Border Success: we coordinate multi-jurisdictional strategies to win parallel disputes.

Global Patent Strategy and Management

We create long-term value for your intellectual property through comprehensive global patent strategies. Our services include:

Portfolio Growth: Designing and executing filing strategies to secure strong patents in key jurisdictions, including the U.S., Europe, and Asia.

Successful Due Diligence: Conducting IP audits by identifying opportunities and mitigating risks in mergers, acquisitions, and licensing.

Global Coordination: Managing prosecution, enforcement, and disputes across jurisdictions to deliver consistent outcomes.

Practice Areas & Sector Specialisations

Key IP Areas

Patent prosecution, Life sciences IP, PTAB litigation, Patent

Key Sector Expertise

Biotechnology, Chemical, Artificial intelligence, Life sciences, Mechanical, Medical device, Nanotechnology, Oil & gas, Pharmaceutical, Robotics, Agriculture

Address:
World Trade Center
Schiphol Boulevard 127
Schiphol
1118 BG
Email:Contact Us Web Address:https://www.leoandus.com

IPS Sponsored

  • Sponsored by Leo&us
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2026 Edition
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Overview

Leo Patent Law Office is a patent law firm with a thematic focus on hard IP guidance. After its inception in 2024, the firm has cultivated a venerable reputation before the European Patent Office (EPO), the United States Patent and Trademark Office (USPTO), and the Unified Patent Court (UPC). European and U.S. patent prosecution is a strength in the medical technology sector.  

Notable patent practitioners: Ronny Amirsehhi, Jason Mirabito and Ikeyama Takuji. 

The managing partner is Ronny Amirsehhi.

Linked Reviews
Patent

The firm provided a suite of prosecution services for Lumenis Be and Virility Medical. It also acted for Sarine Technology in opposition before the EPO. 

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Ronny Amirsehhi discusses learning languages and why patent lawyers must combine the skills of detective, artist and scientist
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