Capshaw DeRieux

Firm Summary: Capshaw DeRieux LLP

Date: 2026-04-30

Capshaw DeRieux LLP is a small litigation firm headquartered in Gladewater, Texas, a key venue within the U.S. District Court for the Eastern District of Texas. The firm’s attorneys, including founding partners S. Calvin Capshaw and Elizabeth L. DeRieux, focus on complex litigation, with a notable concentration in patent infringement cases. Given its size of approximately 2-5 attorneys and its specific focus, it operates as a regional litigation boutique, often serving as local counsel for plaintiffs in federal court. The firm does not appear in national rankings such as the AmLaw 100 or Chambers USA, which typically survey larger corporate law firms.

The firm’s patent litigation practice is centered on representing patent holders in infringement actions, frequently on behalf of non-practicing entities (NPEs) or patent assertion entities (PAEs). Based on tracked cases, the firm exclusively represents plaintiffs. Representative cases show the firm acting as local counsel for plaintiffs asserting patents related to software, mobile communications, and medical devices. For example, the firm has represented My Health, Inc. in suits concerning remote health monitoring technology and Bluebonnet Telecommunications LLC in litigation over smartphone features.

A recent notable case is Lepton Computing LLC v. Samsung Electronics America Inc et al., filed in April 2026 in the Eastern District of Texas. In this ongoing matter, Capshaw DeRieux serves as local counsel to Lepton Computing, an entity asserting infringement of patents related to foldable smartphone technology against Samsung’s Galaxy Z series devices. The firm has also served as local counsel for plaintiffs in significant litigation against other major technology companies, including Google.

There is no significant public record of Capshaw DeRieux representing clients in Patent Trial and Appeal Board (PTAB) proceedings, such as inter partes reviews (IPRs), suggesting the firm’s practice is primarily focused on district court litigation. The key litigators are S. Calvin Capshaw and Elizabeth L. DeRieux, who are consistently named as counsel in the firm’s patent cases.