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Haynes and Boone, LLP

Stephanie Sivinski

Stephanie Sivinski



  • Copyright
  • Franchise Litigation
  • Hatch-Waxman/ANDA
  • Intellectual Property

WSG Practice Industries


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.

Bar Admissions

Texas, 2010
U.S. Patent and Trademark Office, 2018


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
Areas of Practice

Copyright | Franchise Litigation | Hatch-Waxman/ANDA | Intellectual Property | Intellectual Property Litigation | Litigation | Media, Entertainment and Sports | Patent Litigation

Professional Career

Significant Accomplishments

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.

The Supreme Court Declines to Revamp Preclusion Law in Lucky v. Marcel Trademark Dispute
Haynes and Boone, LLP, May 2020

In a unanimous opinion authored by Justice Sotomayor, the U.S. Supreme Court declined to redefine preclusion, reversing the Second Circuit’s decision in trademark dispute Lucky Brand Dungarees Inc. v. Marcel Fashion Group Inc. The Second Circuit’s opinion had attempted to expand res judicata beyond the well-recognized issue preclusion and claim preclusion, creating a new category it called “defense preclusion...

The IP Beacon, August 2018
Haynes and Boone, LLP, August 2018

View the PDF version of the August 2018 IP Beacon. Squarely Decided: The Fifth Circuit Sides with Spongebob On May 22, 2018, inViacom Int’l, Inc. v. IJR Captial Invs., LLC, 242 F. Supp.3d 563 (2017), the Fifth Circuit Court of Appeals upheld summary judgment in favor of Viacom International Inc. (Viacom) on its trademark infringement and unfair competition claims against IJR Capital Investments, LLC (IJR)...

Media, Entertainment, and First Amendment
Haynes and Boone, LLP, May 2018

Fox News v. TVEyes Shows Fair-Use Defense Remains Risky Business “It seems to me that if there were any logic to our language, trust would be a four letter word...

WSG's members are independent firms and are not affiliated in the joint practice of professional services. Each member exercises its own individual judgments on all client matters.

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