Atty. David J. Tsai
David J. Tsai is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Intellectual Property and Litigation - Patent.
Profile Summary
About David J. Tsai at a glance
David J. Tsai is a patent and ip attorney based in San Francisco, California, practicing at Pillsbury. Educated at Santa Clara University (J.D., 2006). Recognitions include Best Lawyers in America — Litigation - Intellectual Property (2026) and Best Lawyers in America — Litigation - Patent (2026). Serands clients in San Francisco, CA and the surrounding metropolitan area.
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About
- David J. Tsai is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Intellectual Property and Litigation - Patent
- David J., who practices law in San Francisco, California, has been recognized since 2021
- This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which David J. is held by other top lawyers in the same geographic and legal practice area
Practice Areas Explained
David J. Tsai's Areas of Practice
Each practice area below reflects the types of cases David J. Tsai handles, with a brief overview of what that area of law covers.
David J. Tsai is one of 20,749 patent attorneys indexed nationally. Browse patent attorneys in California →
IP attorneys protect inventions, brands, and creative work through patent prosecution, trademark registration, copyright, and trade-secret enforcement.
David J. Tsai is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in California →
Jurisdictional Context
Why local counsel matters in California
Practicing law in California. Legal matters in California are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in San Francisco are typically filed in the local municipal court or the appropriate California state district court, depending on subject matter and amount in controversy. An attorney licensed in California brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in California courts without local counsel or pro hac vice admission.
Looking for additional California attorneys? Browse all attorneys in San Francisco or all attorneys in California.
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