Overview
Intellectual Property Counsel to Leaders of Business and Industry
When the leaders of industry are faced with difficult or unique intellectual property issues, Leydig, Voit & Mayer provides trusted counsel. The firm has been at the forefront of intellectual property law for more than 100 years and enjoys an international reputation for excellence in all areas of intellectual property practice.
The firm numbers more than 70 attorneys and patent agents in four offices in the U.S. and Germany and provides counseling, litigation, licensing and prosecution services to clients throughout the world. Our attorneys are supported by more than 100 law clerks, paralegals and administrative personnel, who work to ensure accuracy and timely response.
We have helped to shape the intellectual property landscape, serving clients in such diverse fields as chemicals, computer hardware and software, consumer household products, electronics, financial services, genetic elements, heavy industry, medical devices, machinery and pharmaceuticals.
When the leaders of industry are faced with difficult or unique intellectual property issues, Leydig, Voit & Mayer provides trusted counsel. The firm has been at the forefront of intellectual property law for more than 100 years and enjoys an international reputation for excellence in all areas of intellectual property practice.
The firm numbers more than 70 attorneys and patent agents in four offices in the U.S. and Germany and provides counseling, litigation, licensing and prosecution services to clients throughout the world. Our attorneys are supported by more than 100 law clerks, paralegals and administrative personnel, who work to ensure accuracy and timely response.
We have helped to shape the intellectual property landscape, serving clients in such diverse fields as chemicals, computer hardware and software, consumer household products, electronics, financial services, genetic elements, heavy industry, medical devices, machinery and pharmaceuticals.
Rankings
National
Tier
1
National Ranking
Trademark LawTier
2
National Ranking
Litigation - Intellectual PropertyTier
2
National Ranking
Litigation - PatentTier
2
National Ranking
Patent LawRegional
Chicago
Tier
1
Chicago
Litigation - Intellectual PropertyTier
1
Chicago
Litigation - PatentTier
1
Chicago
Patent LawTier
1
Chicago
Trademark LawSelect Clients
Aetna American International Group Caterpillar, Inc. Huawei Technologies Illinois Tool Works, Inc. Jim Beam Brands Co. National Institutes of Health (NIH) Perrigo Company Teva Pharmaceuticals USA USG Corporation Walgreens Co. Whirlpool
Rankings
National
Tier
1
National Ranking
Trademark LawTier
2
National Ranking
Litigation - Intellectual PropertyTier
2
National Ranking
Litigation - PatentTier
2
National Ranking
Patent LawRegional
Chicago
Tier
1
Chicago
Litigation - Intellectual PropertyTier
1
Chicago
Litigation - PatentTier
1
Chicago
Patent LawTier
1
Chicago
Trademark LawPractice Areas
Leydig, Voit & Mayer LTD has been ranked by Best Law Firms for excellence in 4 specialties, reflecting the firm's commitment to delivering outstanding legal services.
Additionally, the firm provides services in these practice areas:
- Litigation - Intellectual Property
- Litigation - Patent
- Patent Law
- Trademark Law
Individuals Recognized in The Best Lawyers in America®
Leydig, Voit & Mayer LTD proudly has 6 lawyers recognized for their outstanding professional performance in the 2025 edition of The Best Lawyers in America®. This peer-reviewed honor highlights individual excellence and directly qualifies the firm for consideration in the prestigious Best Law Firms rankings. For over four decades, Best Lawyers has been the gold standard for recognizing top legal talent, serving as the cornerstone for Best Law Firms awards. Learn more about our rigorous Best Lawyers research and selection process.
Client Comments
A strong relationship between a client and their law firm is key to achieving the best possible outcomes. Open communication, trust, and collaboration ensure that attorneys understand each client’s unique goals and needs. Choosing the right firm means finding a team with the experience, knowledge, and dedication to guide you through every stage of the legal process.
Client comments reflect personal opinions and individual experiences. Every case is different, and outcomes depend on specific facts and circumstances. Past results and testimonials do not guarantee similar outcomes in future matters. For personalized legal advice, consult directly with an experienced attorney who can evaluate your specific situation and provide tailored guidance.
Awards
Leydig, Voit & Mayer LTD is honored to be recognized for excellence by Best Law Firms and other leading legal industry organizations. Our rankings and awards reflect the dedication, skill, and results our attorneys deliver across a wide range of practice areas. In addition to our Best Law Firms awards, Leydig, Voit & Mayer LTD has earned accolades from respected national and regional publications for outstanding legal service and professional achievement. Explore our awards below to learn more about how Leydig, Voit & Mayer LTD continues to set the standard for quality legal representation.
Leydig, Voit & Mayer Awarded Trademark Prosecution Firm of the Year in the Midwest
Leydig, Voit & Mayer Receives National and Metropolitan First-Tier Rankings by "Best Law Firms"
Leydig Recognized Among Top IP Law Firms in Illinois According to Chambers USA
Leydig Awarded Top Tier Rankings by the Managing Intellectual Property World IP Survey
Leydig, Voit & Mayer Recognized by The Legal 500 for Patent Litigation
Identified as one of the Top Trademark Law Firms in Illinois by the World Trademark Review 1000
Offices & Contacts
Chicago, IL
Two Prudential Plaza, Suite 4900
180 North Stetson Avenue
Chicago, IL 60601-6745
United States
Walnut Creek, CA
The Atrium Building, Suite 310
1981 North Broadway
Walnut Creek, CA 94596-5083
United States
Boulder, CO
4940 Pearl East Circle, Suite 200
Boulder, CO 80301-6104
United States
Washington, DC
700 Thirteenth Street, NW, Suite 300
Washington, DC 20005-3960
United States
Frankfurt/Main, DE
Liebigstrasse 51
60323 Frankfurt am Main
Frankfurt/Main
Germany