Atty. John S. LeRoy
John LeRoy is a highly skilled litigation professional. He uses his electrical and mechanical engineering background, and two decades of intellectual property litigation experience, to represent his clients in high-tech legal disputes and complex licensing negotiations.
Profile Summary
About John S. LeRoy at a glance
John S. LeRoy is a patent and ip attorney based in Royal Oak, Michigan, practicing at Brooks Kushman PC. Admitted to practice in Michigan, United States. Educated at University of Dayton (J.D., 2000). Recognitions include Best Lawyers in America — Litigation - Intellectual Property (2026), Best Lawyers in America — Litigation - Patent (2026), and Best Lawyers in America — Additional Areas of Practice: (2026). Serands clients in Royal Oak, MI and the surrounding metropolitan area.
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About
- John LeRoy is a highly skilled litigation professional
- He uses his electrical and mechanical engineering background, and two decades of intellectual property litigation experience, to represent his clients in high-tech legal disputes and complex licensing negotiations
- John’s practice focuses on patent, trade secret and copyright litigation involving software, electronics, and mechanical systems
- With over 20 years of experience, a Master’s degree in electrical engineering, and a Bachelor’s degree in mechanical engineering, he has successfully represented clients in many different industries
- He focuses on efficiently resolving litigation disputes outside of the courtroom, leaving the jury trial as a “last resort.” And in the courtroom, John has won, and successfully defended against, multiple “$100+ million dollar” jury trials (and related appeals) involving complex technology and intellectual property claims
- Leveraging his extensive software litigation experience, John leads the firm’s FRAND licensing and Open Source Software audit and compliance practice
- With respect to FRAND licensing, John works with automotive OEMs and suppliers to address licensing standard essential patents for wireless communication technology
- John also advises companies regarding effective use of open source software in their commercial products
- He helps companies develop customized corporate policies and strategies for compliance with applicable open source license terms
- John’s team manages source code audits and works closely with software developers and business managers to properly navigate the various open source license terms
- John’s team has undertaken the audit-and-advice service on complex systems in the automotive, consumer electronics, medical device, and computer industries
- John is devoted to his clients’ business interests
- He brings a creative approach to his practice to solve the most complex issues his clients face
- For example, John worked with several automotive companies to create the SmartDeviceLink Consortium, a thriving new organization of automotive companies managing an open source platform for communication between smart devices and automobiles
- John is admitted to practice before the United States Supreme Court, Federal Circuit Court of Appeals, the Sixth Circuit Court of Appeals, and the U.S
- District Courts in the Eastern and Western District of Michigan, the Eastern District of Texas, the Western District of Wisconsin, and Colorado
- John is also a registered patent attorney, and is authorized to practice before the U.S
- Patent Office
- John holds a Master’s Degree in Electrical Engineering from the University of Michigan, and an undergraduate degree in Mechanical Engineering from the University of Buffalo, where he graduated cum laude
- John’s background in both electrical and mechanical engineering allows him to handle patent cases involving many different technologies
- John is a regular guest lecturer on Patent Fundamentals at the University of Michigan
- John has also personally handled six pro bono civil actions, including a pro bono jury trial
- Outside the office, John enjoys fishing and boating with his family in northern Michigan, playing ice hockey, and racing at the M1 Concourse
- He is also a Pack Master for his local scout pack, which according to John, makes IP litigation look easy
- Charities John regularly supports through donation and service include Alternatives for Girls, St. Jude, Gleaners Food Bank, and his local humane society
Practice Areas Explained
John S. LeRoy's Areas of Practice
Each practice area below reflects the types of cases John S. LeRoy handles, with a brief overview of what that area of law covers.
John S. LeRoy is one of 20,749 patent attorneys indexed nationally. Browse patent attorneys in Michigan →
IP attorneys protect inventions, brands, and creative work through patent prosecution, trademark registration, copyright, and trade-secret enforcement.
John S. LeRoy is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in Michigan →
Jurisdictional Context
Why local counsel matters in Michigan
Practicing law in Michigan. Legal matters in Michigan are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Royal Oak are typically filed in the local municipal court or the appropriate Michigan state district court, depending on subject matter and amount in controversy. An attorney licensed in Michigan brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Michigan courts without local counsel or pro hac vice admission.
Looking for additional Michigan attorneys? Browse all attorneys in Royal Oak or all attorneys in Michigan.
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