Atty. Sean Patrick Ambrosius

Atty. Sean Patrick Ambrosius

Sean Patrick Ambrosius is a lawyer practicing internet, litigation, patent infringement and 2 other areas of law. Sean received a B.S. degree from University of California at Santa Barbara in 2003, and has been licensed for 18 years.

Irvine Irvine 18 yrs experience 18 year
Call (951) 584-2685 Book Appointment

Profile Summary

About Sean Patrick Ambrosius at a glance

Sean Patrick Ambrosius is an Associate based in Irvine, California, practicing at Knobbe Martens Olson & Bear LLP. They have 18+ years of legal experience, licensed to practice since 2008. Their practice focuses on patent, trademark, copyright, litigation, and internet. Admitted to practice in California (2008). Educated at University of California School of Law, Los Angeles (J.D., 2007) and University of California at Santa Barbara (B.S. Electrical, 2003). Serands clients in Irvine, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Sean Patrick Ambrosius is a lawyer practicing internet, litigation, patent infringement and 2 other areas of law
  • Sean received a B.S. degree from University of California at Santa Barbara in 2003, and has been licensed for 18 years
  • Sean practices at Knobbe Martens Olson & Bear LLP in Irvine, CA

Practice Areas Explained

Sean Patrick Ambrosius's Areas of Practice

Each practice area below reflects the types of cases Sean Patrick Ambrosius handles, with a brief overview of what that area of law covers.

Patent Law

Sean Patrick Ambrosius is one of 20,749 patent attorneys indexed nationally. Browse patent attorneys in California →

Trademark Law

Sean Patrick Ambrosius is one of 23,222 trademark attorneys indexed nationally. Browse trademark attorneys in California →

Copyright Law

Sean Patrick Ambrosius is one of 17,495 copyright attorneys indexed nationally. Browse copyright attorneys in California →

Civil Litigation

Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.

Sean Patrick Ambrosius is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in California →

Internet & Cyber Law

Internet and cyber lawyers for data breaches, online defamation, privacy law, and cybersecurity matters.

Sean Patrick Ambrosius is one of 17,958 internet attorneys indexed nationally. Browse internet 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 Irvine 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 Irvine or all attorneys in California.

Frequently Asked

Common questions about Sean Patrick Ambrosius

Where is Sean Patrick Ambrosius's law office located?
Sean Patrick Ambrosius's law practice is located in Irvine, California. The firm is Knobbe Martens Olson & Bear LLP. You can contact the office directly through this profile page.
What practice areas does Sean Patrick Ambrosius handle?
Sean Patrick Ambrosius focuses on patent, trademark, copyright, litigation, internet. Each practice area listed reflects experience handling cases of that type in California.
How long has Sean Patrick Ambrosius practiced law?
Sean Patrick Ambrosius has 18+ years of legal experience and has been licensed since 2008.
Where did Sean Patrick Ambrosius go to law school?
Sean Patrick Ambrosius earned their education at (J.D., 2007); (B.S. Electrical, 2003).
How can I contact Sean Patrick Ambrosius for a consultation?
You can contact Sean Patrick Ambrosius directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Education

J.D.
University of California School of Law, Los Angeles
- 2007
B.S. Electrical
University of California at Santa Barbara
- 2003

Bar Admissions

California
Admitted: 2008

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