Thatcher A. Rahmeier



Thatcher A. 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. Thatcher 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 works on diverse areas of technology and industries, with particular focus on electronic and mechanical 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. Thatcher also has experience as first chair representing Delaware inmates in civil rights cases.

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, earning him an electrical engineering degree with the audio engineering option.


  • 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. ThermoLife Int’l LLC et al. v. Vital Pharmaceuticals, et al., Civ. No. 13-651-JLS (S.D. Cal.).
  • Obtained summary judgment in favor of defendant client Proximex Corporation based on the argument that plaintiff failed to sufficiently identify its alleged trade secret in Sector 10, Inc. v. Dutro Co., C.A. No. 119907606 (Utah)


Bar Admissions

  • Delaware
  • U.S. Patent and Trademark Office


  • University of Pittsburgh School of Law, J.D., 2008, cum laude, Pittsburgh Journal of Technology Law and Policy
  • University of Miami, B.S.E.E., 2004

Court Admissions

  • U.S. Court of Appeals, Federal Circuit
  • U.S. Court of Appeals, Third Circuit
  • U.S. District Court, District of Delaware
  • U.S. District Court, Eastern District of Michigan
  • U.S. District Court, Eastern District of Texas


  • American Bar Association
  • Delaware Bar Association
  • Eta Kappa Nu
  • Federal Bar Association