Atty. William John Campbell

Atty. William John Campbell

Mr. William John Campbell is a lawyer practicing business law intellectual property law, business, intellectual property and 3 other areas of law.

Simi Valley Simi Valley 13 yrs experience 13 year
Call (747) 293-5960 Book Appointment

Profile Summary

About William John Campbell at a glance

William John Campbell is a formation, patent, trademark, business, and real estate attorney based in Simi Valley, California. They have 13+ years of legal experience, licensed to practice since 2013. Admitted to practice in Admitted to The State Bar of California (2013) and District of Columbia (2015). Educated at Southwestern Law School (JD, 2013) and Southwestern Univ SOL, Los Angeles, CA St Michael's Coll, Winooski, VT (—). Serands clients in Simi Valley, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mr. William John Campbell is a lawyer practicing business law intellectual property law, business, intellectual property and 3 other areas of law
  • William received a degree from Southwestern Univ SOL, Los Angeles, CA, and has been licensed for 13 years
  • William practices in Simi Valley, CA

Practice Areas Explained

William John Campbell's Areas of Practice

Each practice area below reflects the types of cases William John Campbell handles, with a brief overview of what that area of law covers.

Business Formation

William John Campbell is one of 35,584 formation attorneys indexed nationally. Browse formation attorneys in California →

Patent Law

William John Campbell is one of 20,749 patent attorneys indexed nationally. Browse patent attorneys in California →

Trademark Law

William John Campbell is one of 23,222 trademark attorneys indexed nationally. Browse trademark attorneys in California →

Business & Corporate Law

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

William John Campbell is one of 501,317 business attorneys indexed nationally. Browse business attorneys in California →

Real Estate Law

Real estate attorneys handle home purchases, sales, commercial transactions, title disputes, and landlord-tenant matters.

William John Campbell is one of 316,149 real estate attorneys indexed nationally. Browse real estate 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 Simi Valley 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 Simi Valley or all attorneys in California.

Frequently Asked

Common questions about William John Campbell

Where is William John Campbell's law office located?
William John Campbell's law practice is located in Simi Valley, California. You can contact the office directly through this profile page.
What practice areas does William John Campbell handle?
William John Campbell focuses on formation, patent, trademark, business, real estate. Each practice area listed reflects experience handling cases of that type in California.
How long has William John Campbell practiced law?
William John Campbell has 13+ years of legal experience and has been licensed since 2013.
Where did William John Campbell go to law school?
William John Campbell earned their education at (JD, 2013); (—).
How can I contact William John Campbell for a consultation?
You can contact William John Campbell 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

JD
Southwestern Law School
- 2013
Southwestern Univ SOL, Los Angeles, CA St Michael's Coll, Winooski, VT
- In Progress

Bar Admissions

Admitted to The State Bar of California
Admitted: 2013
District of Columbia
Admitted: 2015

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