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Gregory Hillyer

Washington D.C.

Tel: 202.478.9685
Fax: 215.567.2648


  • Temple University James E. Beasley School of Law, J.D.
  • University of Pittsburgh, M.S. Organic Chemistry
  • State University of New York, B.S. Chemistry


  • United States Patent and Trademark Office
  • District of Columbia
  • Florida Supreme Court
  • US District Court for the Middle District of Florida
  • US District Court for the Southern District of Florida
  • Pennsylvania Supreme Court
  • US District Court for the Eastern District of Pennsylvania
  • Court of Appeals of Maryland
  • US District Court for the District of Maryland
  • Court of Appeals for the Federal Circuit

Gregory L. Hillyer is a Board Certified, Registered Patent Attorney licensed to practice law in Washington, D.C., Maryland, Florida and Pennsylvania. Mr. Hillyer has litigated and tried a wide variety of cases throughout the country, in both federal and state courts, involving patents, trademarks, trade dress, copyrights, trade secrets and false advertising. His experience in the field of patent law is extensive and includes litigation, procurement, counseling, due diligence, freedom to operate, patentability studies, opinion work and serving as a patent expert.

Mr. Hillyer has experience with a variety of technologies including pharmaceuticals, biotechnology, organic and inorganic chemistry, industrial processes, over-the-counter medicines, cosmetics, veterinary products, medical and mechanical devices, polymers, films and finishes, electronics, telecommunications, computer related inventions, business methods, automotive accessories, conventional power generation and alternative energies. Mr. Hillyer has worked as a patent agent for the DuPont Pharmaceutical Company and a synthetic organic chemist for DuPont Merck Research Laboratories in both the medicinal and process divisions, where he authored several publications. Mr. Hillyer also served as an Adjunct Professor of Chemistry at Wingate University.

Mr. Hillyer is listed in Best Lawyers in America® for Intellectual Property Law and has been recognized by several other legal publications for excellence in the field. Mr. Hillyer is the author of several publications and a frequent lecturer on patent related topics. Mr. Hillyer also enjoys teaching trial advocacy. He is currently serving as an Adjunct Professor at American University Washington College of Law and is a former Adjunct Professor at Temple University James E. Beasley School of Law. Prior to joining Feldman Gale, P.A., Mr. Hillyer developed his courtroom skills as a Philadelphia Public Defender. Prior to that, Mr. Hillyer served as a Scientific Advisor and Associate Attorney at Philadelphia's largest intellectual property law firm.

Mr. Hillyer shares the firm's commitment to pro bono work and the advancement of public causes. He currently provides counsel to "It's Our Story", a national, non-profit initiative to raise awareness and change attitudes toward people with disabilities by making their history publicly accessible through video and other means.

Professional Experience

  • Member, Feldman Gale, P.A.
  • Partner, Novak Druce + Quigg LLP
  • Associate and Scientific Advisor, Woodcock Washburn, LLP
  • Assistant Public Defender, Defender Association of Philadelphia
  • Patent Agent, DuPont Pharmaceuticals Company

Teaching Experience

  • Adjunct Professor of Law, American University Washington College of Law
  • Adjunct Professor of Law, Temple University James E. Beasley School of Law
  • Adjunct Professor of Chemistry, Wingate University
  • Teaching Fellow, University of Pittsburgh


  • "Patent Damages Today-But What About Tomorrow?" 9th Annual Advanced Patent Law Institute, 2014
  • "Toil and Trouble for Patent Trolls, Whoever They Are," The Legal Intelligencer, Intellectual Property Special Section, October, 2013
  • Quoted in profile of sanctions order, Virginia Lawyers Weekly, "Discovery Omissions Costly for Mine Equipment Company", November 15, 2012
  • Interviewed by BioPharm Insight and quoted in "Sequenom: Breadth of ’540 Patent Creates Vulnerability to Validity Challenge Despite Strength of Claims," February 24, 2012
  • Speaker, American Bar Association Webinar, "Tackling USPTO Obviousness Rejections," January 20, 2012
  • Interviewed by National Law Journal, "A Revived Injunction," January 2, 2012
  • Contributing author, American Bar Association "Annual Review of Intellectual Property Law Developments," 2011
  • Interviewed by National Law Journal and quoted in "Court Should Have Granted Bosch a Permanent Injunction Against Pylon, Federal Circuit Rules," October 14, 2011
  • "Obviousness Rejections at the USPTO: Prosecution Strategies", American Bar Association 26th Annual Intellectual Property Law Conference, 2011
  • Panelist, "Careers in Litigation", American University Washington College of Law, February, 2011
  • Panelist, "Prosecution, Reexamination and Concurrent Litigation", 6th Annual Advanced Patent Law Institute, 2011
  • "The Written Description Requirement - Is Enablement Enough?," Maryland State Bar Association Bar Bulletin, May, 2010
  • "Let's Do It This Way: Raise Your Hand If You Think You Are NOT An Inventor On This Patent," 5th Annual Advanced Patent Law Institute, 2010
  • Interviewed by PharmaWire and quoted in "Vivus's Qnexa has Strong Patent Although Drug Composed of Two Generic Compounds," September 25, 2009
  • "Inventing the Prior Art, a Contradiction in Terms," Second Annual IP Law Update, Volume II, Maryland State Bar Association, 2009
  • "Removal of Fermentation Inhibiting Compounds From Citrus Waste Using Solvent Extraction and Production of Ethanol," PCT International Publication, WO/2009/143059, November 26, 2009 (inventor)
  • "Ethanol Production from Citrus Waste Through Limonene Reduction," PCT International Publication, WO/2009/143244, November 26, 2009 (inventor)
  • "Understanding Objective Recklessness Under Seagate: Are We There Yet?," 4th Annual Advanced Patent Law Institute, 2008
  • "The Litigation of Patent Infringement Claims," The Florida Bar's Certification Review, July, 2007
  • "Securing and Enforcing Patent Rights," Educational Law Committee of The Florida Bar, September, 2006
  • Interviewed by National Law Journal and quoted in "Prepping for Reality–The Trial Team at Temple Outshines Some More Elite Schools", August 17, 2001
  • "Death of a Salesman: Personal Jurisdiction Based On Offers To Sell," National Law Journal, Intellectual Property Edition, Fall AIPLA Meeting, 1999
  • "Discovery of an Orally Active Series of Isoxazoline Glycoprotein IIb/IIIa Antagonists," Journal of Medicinal Chemistry, 1997, Vol. 40, No. 13, p 2064-2084
  • "(N-Acyl-N-Alkyl) Glycyl Borolysine Analogs: A New Class of Potent Thrombin Inhibitors," Bioorganic and Medicinal Chemistry Letters, Vol. 6, No. 24, 1996, p 2913-2918
  • "Balanced Angiotensin II Receptor Antagonists. I. The Effects Of Biphenyl 'Ortho' - Substitution on AT1/AT2 Affinities," Bioorganic and Medicinal Chemistry Letters, Vol. 4, No. 16, 1994, p 2011-2016
  • "Hydraamphiphiles: Novel Linear Dendritic Block Copolymer Surfactants," Journal of the American Chemical Society, 1994, 116, p 11195-11196


  • Board Certified as a Specialist in Intellectual Property as Accredited by the Florida Bar
  • Best Lawyers In America® 2009-2014
  • Pennsylvania Super Lawyers®, 2013 - 2014
  • Managing IP Magazine, IP Star, 2013
  • The Washington Post, Washington DC's Top Lawyers 2009, 2010, 2011 for Excellence in Intellectual Property Law
  • Florida Super Lawyers®, Intellectual Property Star Search, 2009
  • South Florida Legal Guide, Top Up and Coming Attorneys, 2007
  • Florida Trend Magazine's Legal Elite, 2005
  • The Lewis Powell Medallion for Trial Advocacy from The American College of Trial Lawyers
  • The Murray Love Award for Advocacy from The Pennsylvania Association of Trial Attorneys
  • The Most Promising Litigator Award from The Center for Forensic Economic Studies
  • The Trial Lawyers' Prize from the International Academy of Trial Lawyers
  • The Barrister's Award for Excellence in Trial Advocacy from the James E. Beasley School of Law
  • Safford Award for Excellence in Undergraduate Instruction from the University of Pittsburgh


  • Advanced Patent Law Institute at the United States Patent and Trademark Office, Planning Committee member
  • American Bar Association
  • American Intellectual Property Law Association
  • District of Columbia Bar
  • Florida Bar Association
  • Maryland State Bar Association

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