Michael A. Hierl

F 312.604.2679
Michael A. Hierl is a Shareholder of Hughes Socol Piers Resnick & Dym, Ltd. Mr. Hierl has practiced exclusively in the area of intellectual property law since 1980.

He has considerable experience in a wide range of patent, trademark, unfair competition, copyright, trade secret and regulatory matters, and has successfully resolved numerous intellectual property disputes over the years, with and without litigation. He joined the firm in 2009.

Mr. Hierl has been AV® Preeminent™ rated for over 30 years by Martindale-Hubbell®, the highest rating for attorneys in terms of both legal ability and ethical standards by that company. He has also been named a Leading Lawyer in Intellectual Property law for over 16 years (since the first year of publication) by the Illinois Leading Lawyers Network. Mr. Hierl was recognized as a Top Lawyer in the 2022 Leading Lawyers for the Creative Arts.

Combating Online Counterfeiters


The John Marshall Law School (J.D. 1980)
Northwestern University (M.S. 1976)
Southern Illinois University (B.S. 1975)


Illinois (1980)
U.S. Patent and Trademark Office
U.S. Court of Appeals for the Federal Circuit
U.S. Court of Appeals for the Seventh Circuit
U.S. Court for the Northern District of Illinois
U.S. District Court for the Northern District of Illinois – Trial Bar

Professional Recognition

AV® Preeminent™ Rating by Martindale-Hubbell® (1988-2022)
Leading Lawyer in Intellectual Property (2005-2022) and Top Lawyer in the Creative Arts (2022) by the Illinois Leading Lawyers Network, Law Bulletin Publishing Company
Leading Lawyer — Illinois Leading Lawyers Network

Memberships / Associations

Member, American Bar Association
Member, Illinois State Bar Association
Member, Chicago Bar Association
Member, American Intellectual Property Law Association
Associate Member, International Trademark Association



Representative Matters

Experienced in counseling on the proper use and protection of trademarks and service marks, preparation of trademark availability opinions, prosecution of trademark applications to registration and trademark opposition practice.

Broad experience in the preparation and prosecution of U.S. and foreign patent applications in various chemical, mechanical and electro-mechanical areas including reissue and reexamination practice.

Experienced in negotiating and preparing patent, trademark, copyright and trade secret license agreements and other technology related agreements, providing opinions on patent/trademark infringement and validity matters, counseling clients regarding infringement avoidance and advising on other intellectual property matters including management of IP portfolios.

Represented multiple companies enforcing trademark rights against online sellers of counterfeit products.

Represented authors, publishers, songwriters, musicians, music production companies and movie studios in copyright and contract matters. Copyright litigation has involved copyright infringement, title and damages issues.

Extensive litigation and transactional experience in patent, trademark, unfair competition, copyright and trade secret matters over 40 years of practice involving a wide range of technologies and disciplines.

Back To Top