Mark T. Deming

Mark T. Deming — Patent Litigation Practice Summary

Mark T. Deming is a shareholder in Polsinelli PC's Chicago office and a registered patent attorney (Reg. No. 69,263) whose practice centers on Hatch-Waxman/Paragraph IV pharmaceutical litigation — representing both brand and generic companies — along with medical device and technology patent litigation (per firm bios and his 2016/2018 speaking profiles with The Knowledge Group). His undergraduate degree in computer engineering (University of Illinois, 2006) underpins his work on software and electronics patents, most visibly the Power2B interactive-display litigation. He has been recognized in Best Lawyers for Litigation – Intellectual Property since 2023.

Side preference and firm context. Deming works both sides of the docket. Of his four tracked appearances, three are plaintiff-side (Candela Corp. v. Tankovich; Power2B v. Samsung; an unidentified lead-counsel matter) and one defendant-side (the underlying Power2B IPRs). In practice, he has represented patent owners defending validity (Power2B), petitioners challenging validity (Candela in IPR2023-00234; generic filers), and accused infringers (e.g., Actavis LLC in Millennium Pharmaceuticals v. Actavis, D. Del., where he appeared pro hac vice in 2016). Before joining Polsinelli, he clerked two years for District Judge Michael Schneider and Magistrate Judge John Love in the Eastern District of Texas, one of the busiest patent venues.

Notable cases and outcomes. Deming served as lead/appellate counsel for Power2B against Samsung across two Federal Circuit appeals. In Power2B, Inc. v. Samsung Electronics, No. 23-2184 (Fed. Cir. May 19, 2025), the court affirmed in part and reversed in part, preserving claim 20 of the '364 patent after the Board found Samsung failed to prove it unpatentable. In consolidated Samsung Electronics v. Power2B, Nos. 23-1629, -1631, -1753, -1745 (Fed. Cir., revised Sept. 4, 2025), the court reversed the PTAB's "detector assembly" construction, held several claims obvious, and vacated/remanded dependent claims — a mixed result favoring Samsung on the construction issue. He also represents Candela against Dr. Nikolai Tankovich in IPR2023-00234 and related district court actions (D. Del.; C.D. Cal.).

PTAB/IPR experience and credentials. Deming appears regularly before the PTAB on both sides: as patent-owner counsel for Power2B in the consolidated IPR2022-00315/-00325/-00405 proceedings and related IPRs, and as backup counsel for petitioner Padagis US LLC in IPR2025-00464 (v. Neurelis, Dec. 2025). He is admitted in Illinois (2010), E.D. Tex. (2011), N.D. Ill. (2012), the USPTO (2012), and the Federal Circuit (2013); he holds a J.D. from the University of Illinois College of Law (2009). One tracked matter ("untitled" lead-counsel case) is not publicly identifiable and is not addressed above.