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.
Intellectual Property Litigation & More Attorney · Serving San Francisco, CA · 42+ Years Experience
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. Serves clients in San Francisco, CA and the surrounding metropolitan area.
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About 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
- Mark practices at Crowell & Moring LLP in San Francisco, CA
Practice Areas Explained
Mark Timothy Jansen's Areas of Legal Practice
Each practice area below reflects the types of cases Mark Timothy Jansen handles, with a practical overview of what that area of law involves and how it may apply to your situation in San Francisco.
Business & Corporate Law in San Francisco
Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.
Mark Timothy Jansen is one of 497,491 business attorneys indexed nationally. Browse business attorneys in California →
Intellectual Property in San Francisco
IP attorneys protect inventions, brands, and creative work through patent prosecution, trademark registration, copyright, and trade-secret enforcement.
Mark Timothy Jansen is one of 105,285 ip attorneys indexed nationally. Browse ip attorneys in California →
Trade Secrets in San Francisco
Mark Timothy Jansen is one of 6,604 trade secrets attorneys indexed nationally. Browse trade secrets attorneys in California →
Civil Litigation in San Francisco
Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.
Mark Timothy Jansen is one of 450,750 litigation attorneys indexed nationally. Browse litigation attorneys in California →
Jurisdictional Context
Why Local Counsel Matters in San Francisco
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 venue, 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.
San Francisco Courts and Legal Process
Choosing a San Francisco-based attorney means your counsel already knows the local docketing timelines, preferred filing formats, and how individual judges typically rule on procedural motions — details that only come from practicing in this jurisdiction day after day. That local familiarity can translate to better strategy, faster filings, and fewer costly surprises.
Looking for additional California attorneys? Browse all attorneys in San Francisco or all attorneys in California.
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Professional Profile
Why Clients in San Francisco Choose Mark Timothy Jansen
Selecting an attorney is one of the most consequential decisions you can make when a legal matter arises. Below are the core qualities that distinguish Mark Timothy Jansen's practice in the field of business, ip, trade secrets, and litigation.
Decade-Tested Legal Experience
Mark Timothy Jansen brings 42+ years of hands-on legal practice — enough to have navigated the recurring fact patterns, procedural traps, and negotiation dynamics that shape case outcomes.
Broad Practice Area Coverage
Covering business, ip, and trade secrets, Mark Timothy Jansen can address the full spectrum of a client's legal needs without requiring referrals to separate specialists for each issue.
Local Presence in San Francisco
A San Francisco-based practice means Mark Timothy Jansen attends hearings in the same courthouses, knows the local clerks, and understands the unwritten scheduling norms that affect every case filed here.
Case Types
Common Legal Issues Mark Timothy Jansen Handles in San Francisco
Below is a representative sample of the types of matters Mark Timothy Jansen has experience with under California law. If your situation involves one of these case categories, this attorney may be well positioned to help you understand your options.
This list is illustrative, not exhaustive. Contact Mark Timothy Jansen directly to discuss the specifics of your situation.
Search Reference
How People Find Mark Timothy Jansen Online
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Mark Timothy Jansen's Practice Areas & Specializations
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