Steven E. Warner

Warner Steven

Steven Warner is an intellectual property attorney who focuses on patent application writing, prosecution, counseling, licensing, and enforcement. Steven also renders validity, patentability, non-infringement, and freedom-to-operate opinions – primarily in the mechanical, electrical, and chemical arts. He has been involved in various patent litigations, reexaminations, reissues, and interferences, and has represented clients in appeals and inter partes reviews (IPRs) before the Patent Trial and Appeals Board (PTAB). He has particular skill in patent claim drafting. He also has extensive experience in procuring trademark registrations; he represents clients in the U.S. and internationally.

Steven has prepared and prosecuted patent applications in various technologies, including personal care, air care, home cleaning, and home storage devices and products. He also has experience in semiconductor wafer photolithography and circuit pattern alignment, magnetic and magneto-optical recording devices, laser beam recording, ink jet and bubble jet printing, photocopying, photography, thin-film transistors, textiles, building products, industrial filtration, fluid dispensing, paper making and paper products, fluidized bed combustion, industrial furnace and boiler technology, and fire protection sprinklers and related products.

Prior to entering private practice, Steven was a primary examiner with the U.S. Patent and Trademark Office (USPTO), where he worked in heat, fluid power, combustion, incineration, drying, refrigeration, cryogenic distillation, valves, and internal combustion engine technologies, among others.

He also has extensive experience in trademark clearance, prosecution, and enforcement, notably in the U.S. District Court for the Eastern District of Virginia.


Government Experience

  • Primary Examiner, U.S. Patent and Trademark Office

Representative Clients

  • Amec Foster Wheeler USA Corporation
  • Canon
  • Georgia-Pacific
  • Reliable Automatic Sprinkler Co., Inc.
  • S.C. Johnson & Son
  • Sumitomo SHI FW Energia Oy
  • Tenaris
  • Ullico Inc.
  • Wood PLC




  • J.D. George Washington University Law School 1988
  • B.S. Mechanical Engineering Rochester Institute of Technology
    • Tau Beta Pi (national engineering honor society)
    • Pi Tau Sigma (national mechanical engineering honor society)

Bar Admissions

  • District of Columbia
  • Virginia
  • U.S. Patent and Trademark Office

Court Admissions

  • U.S. Supreme Court
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. District Court for the Eastern District of Virginia

Professional Memberships and Activities

  • Member, American Intellectual Property Law Association
  • Lecturer and CLE coordinator, District of Columbia Bar Association, Intellectual Property Community
  • Elections Board member, District of Columbia Bar Association
  • Saul Lefkowitz Moot Court Board member, International Trademark Association
  • Member, Virginia Bar Association


  • Virginia Access to Justice Commission, Pro Bono Service Honor Roll, 2020 – 2021
  • Managing Intellectual Property, IP Star, 2013 – 2020, 2022 – 2023
  • Legal 500
    • Trademarks: Non-Contentious Full Coverage, 2012
    • Patent Prosecution – Utility And Design Patents, 2014 – 2016
  • Federal Circuit Bar Association
    • Pro Bono, Veterans, and Personnel Pro Bono Programs (Recognized for his personal leadership and commitment)
    • Certificates of Appreciation for Devoted and Invaluable Services


Pro Bono

  • American Energy Heroes – procured numerous trademark registrations
  • Veteran’s Consortium – numerous cases, including a successful appeal to the U.S. Court of Appeals for Veterans Claims resulting in a significant judgment on behalf of the veteran’s widow
  • Counsel of record on Brief of Amicus Curiae for the Federal Circuit Bar Association in support of Petitioner, Lionel Guerra v. Eric Shinseki, Secretary of Veterans Affairs, Respondent, on Petition of Writ of Certiorari


  • Member and production manager, Langley High School Choir Guild, McLean, VA
  • Stage manager, Great Falls Classical Ballet, Great Falls, VA
  • Lector, St. Luke Catholic Church, McLean, VA
  • Board member and production manager, World Children’s Choir, McLean, VA

Personal Activities

  • Golf, martial arts, skiing (water and snow), and travel
  • Vacationing – Hilton Head Island, SC, and Park City, UT