Biography
Eugene Mar specializes in litigating cases for technology companies, with a primary focus on patent infringement, trade secret, copyright, and licensing disputes.
Eugene represents technology companies in patent infringement litigation across the country with deep experience in the Northern District of California, the District of Delaware, and the Eastern and Western Districts of Texas. Technologies at issue have included computer and server systems, computer memory, semiconductors, cybersecurity techniques, mobile and software security systems, software architecture, automotive technologies, and communication protocols. While Eugene is experienced with both jury and bench trials, he has also prevailed in many patent cases without going to trial, obtaining complete victories at summary judgment, claim construction, or on motions to dismiss. Eugene also advises his clients on coordinating their Patent Office IPR or EPR strategy (often also handled by Farella) with their district court litigation strategy to achieve the best result.
Eugene has handled many trade secret disputes and has enjoyed success on behalf of both trade secret enforcers and the accused defendants. He has represented clients across the full gamut of trade secret disputes, from multi-week jury trials to pre-suit counseling and everything in between. He looks for every opportunity to find the story of what happened and persuasively present it to the factfinder. His trade secret experience includes:
- Represented a data center modular technology provider from inception of case all the way through a jury trial and appeal against two major technology companies and achieved successful settlements for the technology provider.
- Defended an SSD controller company against a major Chinese technology company through a jury trial with trade secret misappropriation, breach of contract, and RICO claims, and obtained defense verdict plus a finding of misappropriation against the Chinese company.
- Represented a start-up company against a former co-founder and competitor in a trade secret action.
- Represented a national company in a multi-jurisdiction trade secret litigation against a former officer and competitor.
- Represented a start-up company and its founders against claims levied by a former employer for trade secret misappropriation in a multi-jurisdiction dispute.
Eugene has substantial experience in CFAA, DMCA, unfair competition, trademark, non-solicitation, and non-compete claims, as well as general commercial litigation in federal and state courts and in arbitration. He has litigated IP licensing and AI copyright disputes for premier technology clients.
Eugene prides himself on finding the most efficient path in these cases to achieve the business and litigation objectives of his client, and if a case goes to trial, he is a skilled, aggressive, and effective advocate in the courtroom, experienced in presenting the best themes and arguments to persuade the court and a jury. He enjoys the complexity of high-tech cases and the opportunities they present to learn about new technologies, products, and services. His clients have included Dell Technologies Inc., Twilio Inc., Visa Inc., Mercari U.S. Inc., and Google LLC.
Eugene serves as general counsel to Farella and formerly chaired the firm's Intellectual Property Group.
Distinctions
- Daily Journal, Top Intellectual Property Lawyers (2026)
- Top 100 Patent Attorneys, Patexia Patent Litigation Intelligence Report (2026)
- Chambers USA, California: Intellectual Property - Patent Litigation (2025)
- Best Lawyers in America in the area of Litigation–Intellectual Property (2023-2026)
- Managing Intellectual Property’s IP Stars - Patent Litigation (2018-2025)
- Euromoney Legal Media Group, Americas Rising Stars shortlist, Best in Patent (2019)
- Benchmark Litigation "40 & Under Hotlist" (2017-2019)
- The Recorder’s inaugural list of 50 "Fast Track" lawyers in California (2012)
- Euromoney Legal Media Group to the shortlist of the inaugural Americas Rising Stars Awards in the “Best in Patent” category (2018)
Memberships and Affiliations
- Former Chair, Intellectual Property Section, Bar Association of San Francisco
- Former Co-Chair, Intellectual Property Roundtable Committee, ABA Litigation Section

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