Nate Louwagie is a registered patent attorney with experience counseling clients across a variety of industries in complex intellectual property disputes. He is a zealous advocate who takes pride in identifying winning arguments and clearly articulating them in briefing and oral argument. He also enjoys managing complex cases involving interrelated factual and legal issues, technical subject matter, and high stakes for his clients.

Nate focuses on complex patent litigation in federal district courts, representing clients in disputes that require a deep understanding of the technology, careful development of case strategy, and effective advocacy at trial. He played a critical role on the Carlson Caspers team representing Oxygenator Water Technologies in its patent infringement litigation against Tennant Company. Following a jury trial, the jury found infringement and willfulness on all counts and awarded the full amount of damages requested. The court subsequently entered a final judgment of just over $20 million, including enhanced damages and interest. Nate managed the case from beginning to end, played a key role at trial, and examined multiple witnesses, including both parties’ damages experts. The team also successfully defended against an inter partes review proceeding involving one of the asserted patents.

In another matter, Nate worked on a team representing a defendant in patent litigation that used an inter partes review to invalidate 114 of 117 asserted patent claims and ultimately recover more than $1 million in attorneys’ fees for its client.

Nate has been recognized as a Minnesota Super Lawyers® Rising Star every year since 2019 and was named to The Best Lawyers in America® Ones to Watch list for 2024, 2025, and 2026. In 2026, he was also recognized as a Recommended Attorney in IAM Patent 1000: The World’s Leading Patent Professionals. In 2023, Nate was invited by judges of the U.S. District Court for the District of Minnesota to join a working group focused on reporting patent, trademark, and copyright actions.

Nate is an Officer and Director in the Minnesota Chapter of the Federal Bar. He earned his law degree, cum laude, from the University of Minnesota Law School, with a concentration in Intellectual Property and Technology. He holds a degree in Chemistry from St. John’s University and spent a year researching battery chemistry for Medtronic, Inc. before attending law school.