Mark Hannemann

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Mark Hannemann — Patent Litigation Practice Summary

Focus areas. Hannemann is a New York–based IP litigator whose practice centers on high-stakes patent and trade secret litigation and arbitration for multinational companies. Firm and IAM Patent 1000 descriptions place his technical range across LED/solid-state lighting and semiconductor packaging, automotive systems, computer networking and memory, consumer electronics, MEMS devices, medical devices, SaaS software, UX designs, and cryptography. His sole tracked appearance — Omni MedSci, Inc. v. Samsung Electronics Co., Ltd. et al. (E.D. Tex.) — sits in the wearable/optical physiological-sensing space.

Side preference. Defendant-leaning, not defendant-only. The tracked data shows 1 appearance, 0 plaintiff-side / 1 defendant-side, as lead counsel, consistent with a career-long defense docket for Bosch, OSRAM, and Volkswagen. He does take selective patentee-side work: IAM's firm profile credits him and Alan Clement with spearheading an infringement case for Curia Holdings against Salix (rifaximin polymorph patents, D.N.J.), and he was lead counsel to Robert Bosch in Bosch's affirmative windshield-wiper enforcement campaign.

Firm context. Currently a partner at Troutman Pepper Locke (New York), formed by the January 2025 combination of Locke Lord and Troutman Pepper; the tracked case is docketed to "Locke Lord," which he joined in August 2022 from Shearman & Sterling. Before that he was a partner at Kenyon & Kenyon (joined 1997), after beginning his career as a commercial litigator at an international general practice firm.

Notable matters and outcomes.

• Omni MedSci v. Samsung (No. 2:24-cv-01070-JRG-RSP, E.D. Tex.) — lead counsel for the defense group (Samsung, Fossil, Oura, OnePlus) in a multi-patent wearable-sensor suit; the same patent family is the subject of parallel IPR/PGR challenges (IPR2025-01249 to -01254; PGR2025-00063/-00064). Records show the case still pending as of the 2026 schedule (Markman February 2026; jury selection August 2026).
• Bosch v. Pylon (Fed. Cir.) — reversal and ordered entry of the injunction Bosch sought, a frequently cited post-eBay decision; the same appeal series produced an en banc jurisdictional ruling.
• Volkswagen — Federal Circuit writ of mandamus holding venue improper in the Western District of Texas.
• OSRAM — lead defense counsel in ITC Investigation No. 337-TA-1168 (LED technology), resulting in an initial determination of noninfringement and invalidity; separately represents OSRAM Sylvania as cross-appellant in the Federal Circuit and in a 2026 Supreme Court certiorari proceeding (No. 25-1068).
• Curia IP Holdings v. Salix (D.N.J.) — the '099 patent was resolved by a court-entered stipulation of non-infringement in September 2024.
• SS&C — Connecticut trade secret litigation in which a sanctions ruling led to settlement.

PTAB / IPR. He maintains an active Board practice, appearing pro hac vice as back-up counsel in OSRAM's IPR2019-01487 and -01488 (Lighting Science Group) and on IPR/PGR filings in the Omni MedSci family. Board orders note he is not a registered practitioner and appears by pro hac vice admission.

Bar / education. J.D., Columbia Law School (1995); B.A., Grinnell College; admitted in New York and before the Federal Circuit, Second Circuit, and S.D.N.Y.

Note: search results also surface unrelated individuals named Hannemann (a Washington state litigant and a testifying automotive engineer); the above reflects only the New York patent litigator at Troutman Pepper Locke.