Marc Wade Vander Tuig

Marc Wade Vander Tuig — summary of patent litigation practice

Focus areas. Vander Tuig is an IP litigator whose practice is concentrated in patent disputes, with additional federal-court work in trademark, trade dress, trade secret, and antitrust matters. Firm bios describe experience across semiconductors, pharmaceuticals, telecommunications, chemicals, electronics, motors, and software. His two tracked patent cases both involve the financial-services sector — network/access-control patents asserted by Intellectual Ventures II against regional banks — so the tracked record is narrow and skews toward financial-technology hardware rather than the full spread of industries listed in his practice description.

Side preference. He works both sides, and the tracked data reflects that (1 plaintiff-side, 1 defendant-side appearance). In the Intellectual Ventures matters he represented Commerce Bancshares defensively, both as a target of IV's infringement suits and as a petitioner in the PTAB challenges to IV's patents. His firm bio also lists offensive results — a preliminary injunction for a chemical company, a jury trial win for a semiconductor manufacturer, and Texas-size settlements for construction and chemical clients.

Firm context. He is a partner at Armstrong Teasdale in St. Louis, which he joined in April 2018 from Senniger Powers LLP, also in St. Louis, where he led that firm's PTAB proceedings practice (both tracked cases list Senniger Powers, consistent with that earlier tenure). At Senniger he also worked on Federal Circuit appeals for MEMC Electronic Materials and on the MEMC/SUMCO antitrust litigation.

Notable cases and outcomes. The most prominent tracked matter is the multi-bank challenge to IV's firewall/access-control patent (U.S. Patent No. 6,314,409), brought by Compass Bank, Commerce Bancshares, and First National Bank of Omaha in IPRs 2014-00719 and -00722 and related proceedings. The PTAB invalidated the asserted claims, and the Federal Circuit affirmed (per curiam judgment, Dec. 9, 2016, No. 2016-1416, in which Vander Tuig is listed as counsel for appellee Commerce Bancshares); IV's further appeal was resolved in 2017, a result publicly described as a significant blow to the NPE business model in banking. He is credited in firm materials with related defense wins for financial institutions and IPR victories for chemical, steel, and clean-energy clients.

PTAB / IPR experience. This is a core part of his practice, not an occasional one. He led Senniger Powers' PTAB practice and continues active IPR/PGR work at Armstrong Teasdale, including the 2025 Kubota/Vermeer family of IPRs and a PGR.

Bar and education. J.D., University of Missouri School of Law (2002, Order of the Coif); B.S., University of Missouri (1996); admitted in Missouri, before the USPTO (Reg. No. 57,964), and the Federal Circuit. Recognized in Best Lawyers for Litigation–Patent since 2015.