Atty. Mark Timothy Jansen

Atty. Mark Timothy Jansen

Mark Timothy Jansen is a lawyer practicing intellectual property litigation, litigation & trial, trade secrets and 6 other areas of law. Mark received a B.A. degree from University of California, Santa Cruz in 1978, and has been licensed for 42 years.

San Francisco San Francisco 42 yrs experience 42 year
Call (415) 358-8609 Book Appointment

Profile Summary

About Mark Timothy Jansen at a glance

Mark Timothy Jansen is a Partner based in San Francisco, California, practicing at Crowell & Moring LLP. They have 42+ years of legal experience, licensed to practice since 1984. Their practice focuses on business, ip, trade secrets, and litigation. Admitted to practice in California U.S. Supreme Court U.S. Court of Appeals for the Federal Circuit U.S. Court of Appeals fo (1984). Educated at University of California, Hastings College of the Law (J.D., 1984) and University of California, Santa Cruz (B.A. Chemistry, 1978). Recognitions include BV Distinguished. Provides legal services in French Italian. Serands clients in San Francisco, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mark Timothy Jansen is a lawyer practicing intellectual property litigation, litigation & trial, trade secrets and 6 other areas of law
  • Mark received a B.A. degree from University of California, Santa Cruz in 1978, and has been licensed for 42 years
  • Mark practices at Crowell & Moring LLP in San Francisco, CA

Practice Areas Explained

Mark Timothy Jansen's Areas of Practice

Each practice area below reflects the types of cases Mark Timothy Jansen handles, with a brief overview of what that area of law covers.

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

Mark Timothy Jansen is one of 501,317 business attorneys indexed nationally. Browse business attorneys in California →

Intellectual Property

IP attorneys protect inventions, brands, and creative work through patent prosecution, trademark registration, copyright, and trade-secret enforcement.

Mark Timothy Jansen is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in California →

Trade Secrets

Mark Timothy Jansen is one of 6,644 trade secrets attorneys indexed nationally. Browse trade secrets attorneys in California →

Civil Litigation

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

Mark Timothy Jansen is one of 454,532 litigation attorneys indexed nationally. Browse litigation 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.

Frequently Asked

Common questions about Mark Timothy Jansen

Where is Mark Timothy Jansen's law office located?
Mark Timothy Jansen's law practice is located in San Francisco, California. The firm is Crowell & Moring LLP. You can contact the office directly through this profile page.
What practice areas does Mark Timothy Jansen handle?
Mark Timothy Jansen focuses on business, ip, trade secrets, litigation. Each practice area listed reflects experience handling cases of that type in California.
How long has Mark Timothy Jansen practiced law?
Mark Timothy Jansen has 42+ years of legal experience and has been licensed since 1984.
What languages does Mark Timothy Jansen speak?
Mark Timothy Jansen provides legal services in French Italian. Bilingual representation can be especially important when contracts, testimony, or court filings require accurate translation.
Where did Mark Timothy Jansen go to law school?
Mark Timothy Jansen earned their education at (J.D., 1984); (B.A. Chemistry, 1978).
How can I contact Mark Timothy Jansen for a consultation?
You can contact Mark Timothy Jansen 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.
What awards or recognition has Mark Timothy Jansen received?
Mark Timothy Jansen's notable recognition includes: BV Distinguished.

Education

J.D.
University of California, Hastings College of the Law
- 1984
B.A. Chemistry
University of California, Santa Cruz
- 1978

Awards

BV Distinguished

Bar Admissions

California U.S. Supreme Court U.S. Court of Appeals for the Federal Circuit U.S. Court of Appeals fo
Admitted: 1984

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