Capshaw & Associates

Note: The provided authoritative data lists the firm as "Capshaw & Associates." However, public records indicate that the patent litigators S. Calvin Capshaw and Elizabeth L. DeRieux are partners at the Gladewater, Texas-based intellectual property firm Capshaw DeRieux, L.L.P. The following summary is for Capshaw DeRieux, L.L.P.

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Firm Summary: Capshaw DeRieux, L.L.P.
Date: 2026-05-12

Capshaw DeRieux, L.L.P. is a small litigation boutique based in Gladewater, Texas. The firm was co-founded in 2008 by partners S. Calvin Capshaw and Elizabeth L. DeRieux. Given its size and location, the firm is a regional patent shop well-positioned to serve as local counsel in the patent-heavy dockets of the U.S. District Court for the Eastern District of Texas. The State Bar of Texas lists the firm's size as between two and five attorneys. Key partners S. Calvin Capshaw and Elizabeth L. DeRieux have been recognized by Super Lawyers for their work in intellectual property and business litigation.

The firm’s practice focuses on complex commercial litigation, with a stated emphasis on intellectual property litigation in federal courts. The professional biographies of its partners confirm experience in patent litigation, alongside other federal matters like commercial disputes and employment law. Based on the tracked case AlmondNet, Inc. et al. v. VIZIO, Inc., the firm's work in the patent space involves representing plaintiffs in the digital technology sector, specifically concerning internet-based advertising systems. In this matter, the firm acted as local counsel for the plaintiff.

The firm's litigation history suggests a preference for representing plaintiffs in patent disputes. The single tracked case shows Capshaw DeRieux representing the patent owner, AlmondNet, Inc., a company that has engaged in litigation to enforce its portfolio of digital advertising patents. The firm's role as local counsel in AlmondNet, Inc. et al. v. VIZIO, Inc. is consistent with the business model of a specialized Texas firm supporting lead counsel in major patent assertion campaigns.

Key partners S. Calvin Capshaw and Elizabeth L. DeRieux lead the firm's IP practice. Mr. Capshaw’s experience is centered on patent and commercial litigation, and he is admitted to practice before the U.S. Court of Appeals for the Federal Circuit. Ms. DeRieux also has a broad federal court practice that includes intellectual property and commercial litigation. There is no publicly available information to suggest the firm maintains an active practice before the Patent Trial and Appeal Board (PTAB).