Stephen P. Ellingson

Steve Ellingson's practice focuses on complex commercial litigation and intellectual property matters. He represents software, internet, manufacturing, and other technology companies in disputes involving trademark and trade dress infringement, trade secret misappropriation, defamation and trade libel, statutory and common law unfair competition and business practices, breach of technology license agreements and other contract disputes. Steve has trial and appellate experience in state and federal court, and has litigated trademark disputes before the USPTO Trademark Trial and Appeal Board (TTAB.) In addition to his litigation experience, Steve counsels clients on trademark clearance and prosecutes trademark applications in the USPTO. He also counsels clients and negotiates a wide variety of transactions in the technology sector, including software and other technology licensing agreements. Steve also handles first party and third party extra-contractual insurance coverage litigation, including advertising injury coverage for intellectual property claims and other claims involving casualty coverage. Steve regularly appears on the annual list of Northern California Super Lawyers. He is admitted to practice before all courts of the State of California, the United States District Courts for the Northern, Central, Eastern and Southern Districts, the United States Court of Appeals for the Ninth Circuit and the United States Supreme Court. He is a member of the Federal Bar Association, San Mateo County and Santa Clara County Bar Associations. Steve received his B.A. in economics from the University of California at Berkeley in 1984. He earned his J.D. from the University of California, Hastings College of the Law in 1988, and was admitted to practice in that year. Awards and Honors Super Lawyers® Selectees Stephen P. Ellingson included in a Super Lawyers® list Honors Northern California Super Lawyers Other Sources of Feedback About Stephen P. Ellingson Included on the 2026Northern California Super Lawyers list Past Lists 2025 Northern California Super Lawyers list 2024 Northern California Super Lawyers list 2023 Northern California Super Lawyers list 2022 Northern California Super Lawyers list 2021 Northern California Super Lawyers list 2020 Northern California Super Lawyers list 2019 Northern California Super Lawyers list 2018 Northern California Super Lawyers list 2017 Northern California Super Lawyers list 2009 Northern California Super Lawyers list

• Partner

• California
• U.S. Supreme Court
• U.S. Court of Appeals 9th Circuit
• U.S. District Court Northern District of California
• U.S. District Court Central District of California
• U.S. District Court Southern District of California
• U.S. District Court Eastern District of California
• District of Columbia

• Federal Bar Association (Member)
• Santa Clara County Bar Association (Member)
• San Mateo County Bar Association (Member)