Thatcher Rahmeier is a registered patent attorney who represents clients in litigation and non-litigation matters in Delaware and throughout the nation, including before the Patent Office and International Trade Commission. He focuses his practice on all matters related to intellectual property and related business disputes, including patent and trade secret litigation and patent prosecution and counseling. Thatcher’s work and broad experience extends to diverse technology, industries and legal matters.

A native of Delaware, a top venue for patent litigation, Thatcher is an established presence in the legal community and frequently serves as Delaware counsel for out-of-town attorneys. He participates in all aspects of litigation and has trial experience in courts and administrative bodies around the country. Thatcher regularly negotiates settlements and license agreements. He also has experience as first chair representing Delaware inmates in civil rights cases through trial.

During law school, Thatcher served as a judicial extern for Judge Fred Silverman of the Superior Court of Delaware. While at the University of Miami, Thatcher focused his engineering studies in the areas of acoustics, digital audio, transducers, multimedia, and speech and signal processing.

Recent Representative Matters

  • Successfully represented Vital Pharmaceuticals in a patent infringement matter where client was accused of infringing upon plaintiff’s patents concerning nutritional compositions and methods of use. Out of 81 original defendants, Vital was one of three defendants who refused to settle. Court invalidated all 17 claims of the four asserted patents. Trial counsel team then successfully moved to have the case declared exceptional, and Vital was awarded its attorneys’ fees and expenses, which was affirmed on appeal by the Federal Circuit.
  • Obtained summary judgment in favor of defendant client Proximex Corporation based on plaintiffs failure to identify its alleged trade secret.

Faculty Positions

  • Widener University Delaware Law School — Dissertation Research Adjunct Faculty, 2019-present

Personal Interests

Thatcher’s interests are broad and varied, but center on film and music, particularly The Beatles, and military and British history. Thatcher is a member of the Shakespeare Oxford Fellowship.


Bar Admissions

U.S. Patent and Trademark Office

Court Admissions

U.S. Court of Appeals for the Third Circuit
U.S. Court of Appeals for the Federal Circuit
U.S. District Court for the District of Delaware
U.S. District Court for the Eastern District of Michigan
U.S. District Court for the Eastern District of Texas

Registered Patent Attorney

University of Pittsburgh School of Law
J.D. cum laude, Pittsburgh Journal of Technology Law and Policy (2008)

University of Miami
B.S.E.E. (2004)

Leadership & Community

Pro Bono

Thatcher has represented multiple Delaware prison inmates in matters involving civil rights claims.

Professional Associations

  • Delaware Bar Association
  • Federal Bar Association

Civic Activities

  • FBA Thurgood Marshall Moot Court Competition – Judge
  • Delaware High School Mock Trial Competition – Judge

Firm Leadership

  • Drinker Biddle & Reath LLP — First Year Associate Development Program, Apprenticeship Designee


  • University of Miami — Eta Kappa Nu

Awards Methodology

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