R. Mark Halligan Introduce
For businesses, innovators, and professionals in Illinois, the protection of intellectual property is not just a legal matter—it is the very foundation of their livelihood and success. Navigating the complex world of patents, copyrights, trademarks, and, most importantly, trade secrets requires a legal partner with a rare combination of experience, expertise, and a forward-thinking approach. R. Mark Halligan, a distinguished attorney based in Naperville, Illinois, is precisely that partner. With a national and international reputation as a leading trial lawyer in intellectual property and trade secrets, he brings a level of specialized knowledge that is unparalleled. Mr. Halligan’s practice is dedicated to helping clients, from individual inventors to multinational corporations, safeguard their most valuable assets. His work is at the cutting edge of the field, including the development of innovative systems for trade secret asset management, a testament to his commitment to staying ahead of the curve. This focus on specialized litigation and transactional needs ensures that clients receive the highest caliber of legal advice and representation.
The office of R. Mark Halligan is conveniently located at 34 W Chicago Ave, Suite B, right in the heart of downtown Naperville, Illinois. This prime location is easily accessible for clients throughout DuPage County and the greater Chicago metropolitan area. A key aspect of the firm’s commitment to client service is its focus on accessibility. The office building features a wheelchair-accessible entrance, a wheelchair-accessible parking lot, and a wheelchair-accessible restroom. These thoughtful amenities ensure that all clients, regardless of their mobility needs, can comfortably visit the office for a consultation. The presence of a restroom on-site also adds to the overall convenience. To provide the highest level of focused attention to each client, appointments are highly recommended. This practice ensures that every meeting is tailored to the client's specific legal needs, allowing for a thorough and uninterrupted discussion of their case. This meticulous approach to planning reflects the professional standards of the practice, ensuring that every client feels valued and their time is respected from the very first interaction.
While specific information on all services offered is not available, based on his public reputation, R. Mark Halligan is recognized as a leader in intellectual property law. His expertise extends to both litigation and transactional matters, providing comprehensive legal counsel to businesses and individuals. His practice is known to include, but is not limited to, the following key areas:
- Intellectual Property Litigation: Representing clients in disputes concerning patents, copyrights, trademarks, and trade secrets in both federal and state courts.
- Trade Secrets Law: Specializing in the protection and enforcement of trade secrets, which are often the most valuable assets of a business. This includes a deep understanding of the Defend Trade Secrets Act (DTSA) and related legal frameworks.
- Business and Corporate Law: Offering counsel on various business matters, from the formation of corporations and limited liability companies to a wide array of transactional and dispute-related issues.
- Civil Litigation: Providing representation for clients in a variety of civil disputes, including those that may not fall under the strict umbrella of intellectual property but are still critical to a company's success.
His work as a trial lawyer means he is prepared to represent clients' interests vigorously in court, which is a significant advantage in high-stakes disputes. His expertise is often sought by companies looking to protect their confidential information from misappropriation and to pursue legal action against those who threaten their business.
R. Mark Halligan’s professional profile and achievements highlight several key features that set him apart. He is not just an attorney; he is an authority in his field. He has been recognized with numerous accolades, including being ranked by Chambers USA as one of "America's Leading Lawyers" for intellectual property and being inducted into the Legal 500 Hall of Fame for trade secret litigation. He has also been named "Lawyer of the Year" for Trade Secrets Law by Best Lawyers. Mr. Halligan’s scholarly contributions are also notable, as he has authored several books and articles on intellectual property and trade secrets. For over 25 years, he has taught advanced trade secrets law at the University of Illinois Chicago School of Law, demonstrating his deep expertise and commitment to the field. This unique blend of academic authority and practical trial experience provides clients with a well-rounded and highly competent advocate. The firm’s commitment to providing a wheelchair-accessible environment, including parking, entrance, and restroom, also showcases a professional and inclusive approach to client service. By recommending appointments, the practice ensures that every client interaction is meaningful and productive, focusing on the client’s needs without interruption. This dedication to expertise, professionalism, and client care makes him a premier choice for legal representation.
If you are in need of expert legal advice on intellectual property, business law, or related litigation, contacting R. Mark Halligan is a crucial first step. The office is located at 34 W Chicago Ave suite B, Naperville, IL 60540, USA. You can reach the office by phone at (630) 200-0701. The mobile phone number is +1 630-200-0701. Given the highly specialized and detailed nature of his work, it is essential to schedule an appointment. This will allow for a comprehensive discussion of your legal matter and ensure that you receive the dedicated attention you need. Whether you are a business owner seeking to protect your trade secrets or an individual inventor with a valuable idea, an initial consultation can provide the clarity and direction you need to move forward with confidence.
Choosing a lawyer, particularly for complex matters like intellectual property, requires careful consideration. R. Mark Halligan is an excellent choice for a number of reasons. His extensive experience and specialized focus on intellectual property and trade secrets law mean you are not just hiring a lawyer, but a recognized leader in the field. His dual role as a practicing trial lawyer and a published author and professor gives him a unique and authoritative perspective that can be invaluable in high-stakes cases. This deep well of knowledge ensures that your legal strategy is not only sound but also at the forefront of legal innovation. Furthermore, the practice’s commitment to client accessibility and its professional, appointment-based approach ensures that you will be treated with the respect and personal attention your case deserves. For anyone in the Naperville or Illinois area looking for an attorney to handle intellectual property, business, or litigation matters with the highest level of expertise and integrity, R. Mark Halligan offers the rare combination of a world-class legal mind with a local, accessible presence.
R. Mark Halligan Details
Accessibility
- Wheelchair accessible entrance
- Wheelchair accessible parking lot
- Wheelchair accessible restroom
Amenities
- Restroom
Planning
- Appointments recommended
R. Mark Halligan Photos



R. Mark Halligan Location
R. Mark Halligan
34 W Chicago Ave suite b, Naperville, IL 60540, USA
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