Michael Bregenzer


Practices & Industries:

Utility Patent, Design Patent, Other Complex Litigation

Contact Information:


Michael Bregenzer joined Irwin IP as a Senior Attorney in 2020, and is now a partner in the firm. Michael has over 25 years of experience in intellectual property and complex commercial litigation; transactional matters, including mergers and acquisitions, and IP licensing negotiations. Prior to joining Irwin IP, Michael was General Counsel at Ranir, LLC, a successful private equity owned business, where he was responsible for all legal matters.  This experience provided Michael with the understanding of the issues and pressures facing in-house attorneys and has led to a pragmatic approach to litigation guided by the client’s best interests.  Before joining Ranir, Michael was an IP litigation partner at two of the world’s largest law firms.

Court Admissions

States of Illinois, Michigan, and Nevada
U.S. District Court for Northern District of Illinois, including Trial Bar
U.S. District Court for Western District of Michigan
Federal Circuit Court of Appeals

Prior Experience

Served as General Counsel and Corporate Secretary responsible for all aspects of legal affairs for Ranir, LLC, which was subsequently acquired by Perrigo Company plc. Mike was also a Partner at Reed Smith LLP with practice focused on intellectual property litigation and complex commercial litigation, including patent litigation, contractual disputes, Lanham Act claims, and other claims involving business torts. And before joining Reed Smith, Michael was a partner at Kirkland & Ellis LLP in its Intellectual Property practice.


University of Illinois Urbana-Champaign, Champaign, Illinois

J.D., 1994

Graduated Cum Laude

Articles Editor—The Elder Law Journal

University of Notre Dame, Notre Dame, Indiana

B.A., History and Philosophy, 1991

Honors Program—Graduated with Distinction

Phi Alpha Theta—History Honors Fraternity

Papers, Seminars, and Teachings

Recent Trends in Patent Infringement Lawsuits, Chapter No. 1: “False Marking Claims,” Thomson Reuters, 2011

Protective Orders Line By Line: A Detailed Look at Protective Orders and How to Change Them to Meet Your Needs, Aspatore Books, 2009

“Have Made Rights: A Trap for the Unwary,” Intellectual Property Today, 2003

Irwin IP Cases of the Week