Gillis & Mateschen

Based on available public records as of May 6, 2026, Gillis & Mateschen appears to be a specialized patent litigation firm. Public information about the firm's size, office locations, and history is limited, as it does not appear in major legal directories or rankings such as Chambers & Partners, AmLaw, or Vault. The firm's attorneys of record in its tracked litigation are Stevenson Gillis and Daniel Mateschen.

The firm's patent litigation practice, based on its single tracked appearance, is focused on representing patent holders in assertion campaigns. In its only documented case, Gillis & Mateschen served as lead counsel for the plaintiff, AML IP LLC. Publicly available information on other patent cases involving AML IP LLC suggests it is a patent assertion entity, which indicates Gillis & Mateschen's practice may center on representing non-practicing entities (NPEs) or similar patent monetization clients.

The firm’s one tracked case is AML IP LLC v. CEC Entertainment Concepts, LP, filed in April 2026 in the U.S. District Court for the Northern District of Texas. In this matter, Stevenson Gillis is listed as Lead Counsel for the plaintiff. Given the recent filing date of this case, no public outcomes such as trial verdicts or appellate decisions are available.

There is no public record of Gillis & Mateschen representing clients in inter partes review (IPR) or other post-grant proceedings before the Patent Trial and Appeal Board (PTAB). Without a firm website or other verifiable sources, further details regarding the specific technological focus of the firm's partners or its broader litigation practice could not be confirmed.