Dennis is a lead trial lawyer specializing in patent and other intellectual property disputes.
He has litigated in patent-heavy forums across the country, including in the District of Delaware, the Eastern and Western Districts of Texas, the International Trade Commission, the Northern District of Illinois, the Eastern District of Michigan, the Middle District of Florida, and the Central District of California, among others. He has defended and challenged patents as lead counsel in IPR litigation proceedings before the Patent Trial and Appeal Board at the U.S. Patent & Trademark Office.
Dennis appears frequently in appeals at the Court of Appeals for the Federal Circuit. He argued and won a patent appeal at the Federal Circuit that was deemed “one of the “Biggest Patent Rulings of 2019” and one of “5 Patent Cases To Watch In The Second Half of 2021” by Law360.
Dennis maintains an active pro bono docket. He recently argued a pro bono appeal before the Seventh Circuit Court of Appeals. He also obtained a favorable settlement for a pro bono client in a prisoner litigation, which he led as part of his Trial Bar responsibilities in the Northern District of Illinois. In that case, Dennis first-chaired a preliminary injunction hearing, winning his client a rare mandatory injunction for badly-needed medical care.
In addition to, and as part of his litigation work, Dennis also counsels clients on all aspects of intellectual property protection, enforcement, and defense.
Before Honigman, Dennis was a litigator at Kirkland & Ellis, and before that clerked for the Honorable Timothy B. Dyk at the Federal Circuit. Dennis is a former patent examiner at the USPTO.