Stephanie Sivinski


Education and Clerkships

J.D., University of Texas at Austin School of Law, 2010, High Honors; Order of the Coif; Texas Law Review, Member; Winner, Bracewell and Giuliani Best Memo Competition, 2008

B.S., Genetics, Texas A&M University, 2007, summa cum laude; National Merit Scholar, 2003-2007

  • Judge Mark E. Fuller, United States District Court, Middle District of Alabama, 2010-2011


Texas, 2010

U.S. Patent and Trademark Office, 2018

Court Admissions

United States Supreme Court

U.S. District Court for the Eastern District of Texas

U.S. District Court for the Northern District of Texas

U.S. District Court for the Southern District of Texas

U.S. Court of Appeals for the Federal Circuit


Stephanie Sivinski is able to weave complicated concepts into persuasive written advocacy that both the court and the fact-finder can understand. Stephanie’s intellectual property and commercial litigation practice focuses on the chemical and life sciences, including representation of generic pharmaceutical companies in Hatch-Waxman litigation. Her practice has also touched on topics as varied as thermodynamics, computer software, and semiconductor manufacturing. Whether in motion practice before the federal district court or briefing in the courts of appeals, Stephanie can convey the necessary technical detail while focusing on the important legal and factual issues. Clients highly value this skill, particularly in federal court litigation where most decisions are based entirely on the parties’ written submissions.

Before putting her technical and writing skills to work in patent, copyright, and trade secret disputes, Stephanie honed these skills as a judicial law clerk to a United States District Judge. While pursuing an undergraduate degree in genetics, Stephanie developed a working knowledge of organic chemistry, biochemistry, analytical chemistry, microbiology, and molecular genetics. As an undergraduate research assistant, she frequently performed DNA amplification, reverse transcription, and gel electrophoresis techniques.

In addition to her civil litigation practice, Stephanie has devoted a great deal of time to pro bono representation of an inmate on Texas death row. She participated in the two-week-long evidentiary hearing on his petition for writ of mandamus and presented evidence that her client is ineligible for the death penalty under the Eighth Amendment’s prohibition on executing intellectually disabled individuals. Stephanie takes great pride in the opportunity to tell her client's story.

Professional Recognition

  • Recognized as a "Legal Lion" by Law360 for a defense victory in an intellectual property trial in the Eastern District of Texas, 2019
  • Selected for inclusion in Texas Super Lawyers Rising Stars, Thomson Reuters, 2018-2019

Intellectual Property


Haynes and Boone Wins IP Verdict for Korean Client in EDTX

A Haynes and Boone team led by Partner Russ Emerson and Associate Stephanie Sivinski won a rare defense victory in an intellectual-property trial in the Eastern District of Texas.


Super Lawyers

Haynes and Boone Lawyers Selected as Texas Rising Stars 2019

Texas Super Lawyers Rising Stars 2018, published by Thomson Reuters, has recognized 22 Haynes and Boone lawyers as up-and-coming practitioners in the state.

Selected Client Representations

  • Won summary judgment of noninfringement for oil and gas operator against non-practicing entity in the Eastern District of Texas. 
  • Obtained favorable jury verdict, including invalidity of an asserted patent, for leading WAN technology company. 
  • Obtained dispositive claim construction for semiconductor manufacturer in patent infringement case relating to semiconductor fabrication techniques in the Eastern District of Texas. The construction was upheld by the Federal Circuit.
  • Won summary judgment relating to indemnification claims and requiring disbursement of escrow account in Delaware Chancery Court. 
  • Defended inventors of laser ultrasound technology against claims brought by former employer for patent infringement, trade secret misappropriation, and declaratory judgment of patent ownership. The client was able to reach a settlement in this matter. 
  • Submitted briefs to the United States Court of Appeals for the Fifth Circuit in a software copyright case and the United States Court of Appeals for the Federal Circuit in patent infringement cases.
  • Represented a generic drug manufacturer defending against claims of patent infringement under the Hatch-Waxman Act. The matter reached a favorable settlement. 
  • Defended a non-profit organization against claims of copyright infringement and breach of contract, helping to reach a very favorable settlement for the client.

Professional and Community Activities

  • DFW Women in IP
  • ChIPs
  • March of Dimes, Breakfast with a Champion Committee (2017)
  • Dallas Bar Association Intellectual Property Section, Young Lawyers Committee

Selected Publications and Speeches

  • Dallas Bar Association's CLE: 2018 State of Intellectual Property Law Address, speaker, Dallas, TX, November 30, 2018. 
  • “Patents for Entrepreneurs”, speaker, Project Lead the Way State Conference, Dallas, TX, February 13, 2018.
  • "Federal Circuit Appeals From the PTAB: A New Game or Just the Same Old Practice," author, Journal of the Patent & Trademark Office Society, November 22, 2013.
  • "Federal Circuit Appeals From the PTAB: A New Game or Just the Same Old Practice?" co-author, Haynes and Boone White Paper, February 1, 2013.
  • "Putting Too Many (Fertilized) Eggs in One Basket: Methods of Reducing Multifetal Pregnancies in the United States," author, 88 Texas L. Rev. 897 (2010).

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