Mark R. Bagley

Mark has successfully litigated federal lawsuits through the trial phase. He has experienced all phases of the litigation process, including discovery, motion practice, depositions, preparation of experts, trial preparation, trial and appeal.

Mark’s litigation experience includes cases involving trademark infringement, copyright infringement, unfair trade practices, and patent infringement. He has also litigated numerous commercial disputes, involving topics such as breach of contract, defamation, and cybersquatting in state and federal courts. He has represented clients in mediation, arbitration and administrative proceedings of all types, including internet domain name proceedings.

Mark has prosecuted trademark applications and conducted opposition and cancellation proceedings before the U.S. Patent and Trademark Office (USPTO). He has also counseled clients on trademark availability and the registration and protection of copyright portfolios. He has conducted IP due diligence investigations for business acquisition transactions.

Mark has represented a wide variety of local, national, and international clients. A sample of the matters on which he has worked includes:

• Represented a German cosmetics manufacturer in a lawsuit involving trademark infringement, disputes over trademark ownership, and
breach of contracts

• Represented an Australian boot manufacturer in a dispute with a major U.S. footwear brand involving trademark validity, trademark
infringement, and design patent infringement

• Represented a client in copyright infringement litigation involving test preparation materials for standardized testing

• Represented a local e-commerce company in a lawsuit concerning trademark infringement and the legality of a secondary market for
branded gift cards

• Represented an internet retailer in a design patent infringement lawsuit brought by a large fashion eyewear manufacturer


Illinois State Bar
Missouri State Bar
U.S. District Court for the Northern District of Illinois
U.S. District Court for the Eastern District of Missouri
U.S. Court of Appeals for the Federal Circuit


Mark obtained his law degree from the University of Chicago Law School, where he was a member of the Law Review. He graduated cum laude from Harvard University with an A.B. degree in English and American Literature and Language.


International Trademark Association – Internet Committee (2010-2013); Enforcement Committee (2014-2017); Internet Committee (2018-present)


Chicago Bar Association Intellectual Property Law Committee (January, 2011) – Topic: New Internet Top-Level Domain Names: Strategies for Trademark Protection
Chicago Bar Association Intellectual Property Law Committee Spring Seminar (April, 2011) – Topic: Internet Legal Issues