Ansel Halliburton

415-955-1155 , Ext. 122
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Ansel Halliburton advises startups, growing companies, and entrepreneurs on IP strategy, data privacy and security, export controls, and corporate and securities law issues. Ansel has helped clients negotiate and close investment rounds, acquisitions, major sales contracts, licensing deals, and partnerships. Ansel also helps clients register copyrights and trademarks in the online and digital technology realms.

Well-versed in all aspects of litigation, Ansel manages complex intellectual property and fraud cases from inception through trial proceedings and to final judgments in state and federal courts. Ansel has won several cases resulting in verdicts in excess of $1 million. His cases have tested the boundaries of the law on electronic signatures and the interpretation of open source software licenses.

A programmer since age 10, Ansel stands at the crossroads of technology and the law, uniting the two disciplines through his personal and professional experience. Ansel initially worked as a software engineer for mobile technology and information retrieval startups before entering the legal field. As the first engineer with the Stanford Intellectual Property Litigation Clearinghouse — a pioneering legal analytics project later spun off as leading legal technology startup Lex Machina (acquired by LexisNexis) — he created specialized web crawlers and an open source rules engine that powered the most comprehensive IP litigation database and analytics tool.

The best results come from a deep understanding of both the law and technology.

Black Duck Legal Specialist CertificationAnsel leverages this unique background in advising clients regarding open source software licensing and cryptography export controls. Having received training on Black Duck Software’s open source and export compliance tools, Ansel is a Black Duck Certified Legal Professional.

Ansel earned a Bachelor’s degree from the University of California, Berkeley, where he was a founding member of the Berkley Political Review. He later completed his Juris Doctor at the UC Davis School of Law, where he won a Witkin Award for Academic Achievement in Trademark Law, contributed to both the UC Davis Business Law Journal and UC Davis Journal of International Law & Policy, and represented domestic violence and sexual assault survivors in a legal clinic.

Ansel's achievements have been recognized in his selection to the Daily Journal's 2016 "Top 40 Under 40" list, and as a Northern California Super Lawyers "Rising Star" in 2014 and 2015.

Before joining Kronenberger Rosenfeld, Ansel founded Halliburton Legal, a law firm dedicated to serving Silicon Valley technology startups, and was an associate at an IP litigation law firm before that. He is a member of the California Bar.

  • Represented a software-as-a-service startup in its $7 million Series A financing.
  • Represented an open source software developer in copyright and patent cases asserting enterprise software company’s violation of open source license, and infringement of patents and copyrighted source code. The cases received substantial attention in the open source community.
  • Assumed the global trademark portfolio of a startup backed by $28 million in venture financing during its acquisition by a major Internet company.
  • Represented a music streaming software startup in closing its $1 million Series A financing, and in closing deals with both small and major record labels.
  • Represented an ousted minority co-founder in a dispute with a startup. Resolved on favorable terms.
  • Represented a startup in a wage claim by filed by its former employee. Resolved on favorable terms.
  • Represented a large software company in evaluating its export obligations in relation to cryptography libraries and open source software.
  • Represented plaintiffs in a hotly-contested securities fraud case, including several ex parte appearances. Won motion to enforce settlement agreement.
  • Represented plaintiff company and its founder in a trademark infringement case through discovery, summary judgment motions, and week-long jury trial.
  • Represented a software consulting company in a bench trial in a fiduciary breach case against its former contractor, and in a related malpractice case against its former lawyer. Obtained judgment against the contractor for more than $700,000.
  • Represented multiple defendants in an online defamation case stemming from online reviews.
  • Represented a lawyer in an appeal from an defamation case about online postings of court documents from a case the lawyer was handling.

University of California, Berkeley, B.A.

UC Davis School of Law, J.D.

  • State Bar of California
  • U.S. District Court for the Northern District of California
  • U.S. District Court for the Eastern District of California

Previous Attorney

Liana Chen

Kronenberger Rosenfeld recognized as a Top Boutique of 2015 by The Daily Journal

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