Atty. Daniel Simon Mason

Atty. Daniel Simon Mason

Daniel Simon Mason is a lawyer practicing advisory services, breach of contract, china trade regulation and 11 other areas of law. Daniel received a B.A. degree from University of California, Los Angeles in 1969, and has been licensed for 54 years.

San Francisco San Francisco 54 yrs experience 54 year
Call (415) 728-9546 Book Appointment

Advisory Services & More Attorney · Serving San Francisco, CA · 54+ Years Experience

Profile Summary

About Daniel Simon Mason at a Glance

Daniel Simon Mason is a Partner based in San Francisco, California, practicing at Zelle LLP. They have 54+ years of legal experience, licensed to practice since 1972. Their practice focuses on contracts, business, ip, breach of contract, and class action. Admitted to practice in California (1972), District of Columbia (2003), and Indiana (2007). Educated at Duke University (J.D., 1972) and University of California, Los Angeles (B.A., 1969). Recognitions include AV Preeminent. Serves clients in San Francisco, CA and the surrounding metropolitan area.

Verified attorney profile · Updated October 2026

About Daniel Simon Mason

  • Daniel Simon Mason is a lawyer practicing advisory services, breach of contract, china trade regulation and 11 other areas of law
  • Daniel received a B.A. degree from University of California, Los Angeles in 1969, and has been licensed for 54 years
  • Daniel practices at Zelle LLP in San Francisco, CA

Practice Areas Explained

Daniel Simon Mason's Areas of Legal Practice

Each practice area below reflects the types of cases Daniel Simon Mason handles, with a practical overview of what that area of law involves and how it may apply to your situation in San Francisco.

Contracts in San Francisco

Daniel Simon Mason is one of 76,101 contracts attorneys indexed nationally. Browse contracts attorneys in California →

Business & Corporate Law in San Francisco

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

Daniel Simon Mason 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.

Daniel Simon Mason is one of 105,285 ip attorneys indexed nationally. Browse ip attorneys in California →

Breach of Contract in San Francisco

Daniel Simon Mason is one of 5,880 breach of contract attorneys indexed nationally. Browse breach of contract attorneys in California →

Class Action in San Francisco

Daniel Simon Mason is one of 26,226 class action attorneys indexed nationally. Browse class action 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.

Frequently Asked

Common Questions About Daniel Simon Mason

Where is Daniel Simon Mason's law office located?
Daniel Simon Mason's law practice is located in San Francisco, California. The firm is Zelle LLP. You can contact the office directly through this profile page.
What practice areas does Daniel Simon Mason handle?
Daniel Simon Mason focuses on contracts, business, ip, breach of contract, class action. Each practice area listed reflects experience handling cases of that type in California.
How long has Daniel Simon Mason practiced law?
Daniel Simon Mason has 54+ years of legal experience and has been licensed since 1972.
Where did Daniel Simon Mason go to law school?
Daniel Simon Mason earned their education at (J.D., 1972); (B.A., 1969).
How can I contact Daniel Simon Mason for a consultation?
You can contact Daniel Simon Mason 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 Daniel Simon Mason received?
Daniel Simon Mason's notable recognition includes: AV Preeminent.

Professional Profile

Why Clients in San Francisco Choose Daniel Simon Mason

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 Daniel Simon Mason's practice in the field of contracts, business, ip, breach of contract, and class action.

Decade-Tested Legal Experience

Daniel Simon Mason brings 54+ years of hands-on legal practice — enough to have navigated the recurring fact patterns, procedural traps, and negotiation dynamics that shape case outcomes.

Multi-State Bar Admission

Licensed in California, District of Columbia, and Indiana, Daniel Simon Mason can represent clients in cases that span state lines or require counsel in multiple jurisdictions.

Broad Practice Area Coverage

Covering contracts, business, and ip, Daniel Simon Mason 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 Daniel Simon Mason 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 Daniel Simon Mason Handles in San Francisco

Below is a representative sample of the types of matters Daniel Simon Mason 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.

Business formation and structure
Business
Contract drafting and review
Business
Partnership disputes
Business
Merger and acquisition support
Business
Trademark registration
IP
Copyright infringement defense
IP
Patent prosecution
IP
Trade secret protection
IP

This list is illustrative, not exhaustive. Contact Daniel Simon Mason directly to discuss the specifics of your situation.

Search Reference

How People Find Daniel Simon Mason Online

Prospective clients searching for legal help in San Francisco commonly use a combination of the attorney's name and their specific legal need. The following search terms frequently lead people to this profile and to attorneys like Daniel Simon Mason.

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If any of the above matches what you searched for, you've found the right profile. Use the contact options at the top of this page to get in touch with Daniel Simon Mason directly.

Education & Law School Background

J.D.
Duke University
- 1972
B.A.
University of California, Los Angeles
- 1969

Awards & Professional Honors

AV Preeminent

Bar Admissions & Licensed Jurisdictions

California
Admitted: 1972
District of Columbia
Admitted: 2003
Indiana
Admitted: 2007

Client Reviews & Ratings — Daniel Simon Mason

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