Brian Eutermoser

Brian Eutermoser — Patent Litigation Practice Summary

Brian Eutermoser is a partner in King & Spalding's Denver office and a registered patent trial attorney whose practice spans district-court patent litigation and inter partes review before the PTAB. Per his firm profile, he handles high-stakes disputes across medical devices, enterprise hardware and software, wireless communications, website/streaming technologies, semiconductors, and LEDs, with a technical foundation in mathematics and physics-engineering. His tracked docket centers on a single, high-profile patent war: representing SportsCastr Inc. (d/b/a Panda Interactive) in its Eastern District of Texas infringement suits against Genius Sports and Sportradar (2:23-cv-00471, 2:23-cv-00472) involving low-latency interactive sports-streaming patents, while simultaneously defending those patents as lead counsel in coordinated IPR challenges filed by both competitors (e.g., IPR2024-01305/01307/01311, IPR2025-00251/00252, IPR2025-00266/00269/00273/00275).

Side and role. The tracked case list shows a balanced mix — 2 plaintiff-side and 2 defendant-side appearances — and he works both sides of the docket. His recent emphasis has been plaintiff/patent-owner work for an operating company (Panda Interactive) asserting its own streaming patents and defending them at the PTAB, though his firm-profile matters include significant defense work for operating companies (Motorola Mobility in St. Lawrence Communications v. Motorola Mobility, E.D. Tex., speech coders; Palo Alto Networks in Finjan v. Palo Alto Networks IPRs). In the tracked IPRs he was designated lead counsel for the patent owner, then substituted out in several proceedings in mid-2025 (e.g., IPR2025-00275), consistent with his "former/prior lead counsel" designations.

Notable outcomes. Eutermoser was part of the King & Spalding trial team that secured a $42.9 million unanimous willful-infringement jury verdict for Skillz Platform against AviaGames (N.D. Cal., Feb. 2024), a win the firm touted and that earned the team Law.com "Litigators of the Week" recognition. In the Genius/Sportradar IPRs, the PTAB issued final written decisions in March 2026 finding challenged SportsCastr claims unpatentable, and Panda noticed appeals to the Federal Circuit in May 2026; several parallel Sportradar petitions were denied on discretionary grounds in June 2025. He has also appeared in IPRs for Medline (against C.R. Bard) and as patent-owner lead counsel for e-Vision Optics against Luxottica (IPR2024-01030 et al.) and Open Text against AO Kaspersky Lab (IPR2023-01160).

PTAB and credentials. PTAB/IPR work is a core part of his practice — he appears regularly, usually as lead patent-owner counsel, across multiple technology areas. He holds a J.D. from NYU School of Law (2006) and a B.S. in Mathematics and Physics-Engineering from Washington and Lee (2000); he is admitted in New York (2007) and Colorado (2009), is admitted to the Federal Circuit bar, and is registered before the USPTO (Reg. No. 64,058). Earlier in his career he practiced at Brownstein Hyatt Farber Schreck and Cooley LLP in Denver before joining King & Spalding.