Atty. John M Callaghan

Atty. John M Callaghan

John M Callaghan is a lawyer practicing antitrust & trade law, commercial, global litigation and 2 other areas of law. John received a degree from Creighton University School of Law, Omaha NE, and has been licensed for 54 years.

Los Angeles Los Angeles 54 J. Erfahrung 54 year
Call (213) 660-2403 Book Appointment

Profile Summary

About John M Callaghan at a glance

John M Callaghan is a business, ip, securities, litigation, and consumer attorney based in Los Angeles, California. They have 54+ years of legal experience, licensed to practice since 1972. Admitted to practice in California (1972). Educated at Creighton University School of Law (JD, 1966) and Creighton University School of Law, Omaha NE (—). Serands clients in Los Angeles, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

Über uns

  • John M Callaghan is a lawyer practicing antitrust & trade law, commercial, global litigation and 2 other areas of law
  • John received a degree from Creighton University School of Law, Omaha NE, and has been licensed for 54 years
  • John practices in Los Angeles, CA

Practice Areas Explained

John M Callaghan's Areas of Practice

Each practice area below reflects the types of cases John M Callaghan 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.

John M Callaghan 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.

John M Callaghan is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in California →

Securities Law

John M Callaghan is one of 64,529 securities attorneys indexed nationally. Browse securities attorneys in California →

Civil Litigation

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

John M Callaghan is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in California →

Consumer Protection

Consumer protection attorneys for fraud, lemon law, debt harassment, and deceptive trade practices.

John M Callaghan is one of 50,607 consumer attorneys indexed nationally. Browse consumer 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 Los Angeles 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 Los Angeles or all attorneys in California.

Frequently Asked

Common questions about John M Callaghan

Where is John M Callaghan's law office located?
John M Callaghan's law practice is located in Los Angeles, California. You can contact the office directly through this profile page.
What practice areas does John M Callaghan handle?
John M Callaghan focuses on business, ip, securities, litigation, consumer. Each practice area listed reflects experience handling cases of that type in California.
How long has John M Callaghan practiced law?
John M Callaghan has 54+ years of legal experience and has been licensed since 1972.
Where did John M Callaghan go to law school?
John M Callaghan earned their education at (JD, 1966); (—).
How can I contact John M Callaghan for a consultation?
You can contact John M Callaghan 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
Creighton University School of Law
- 1966
Creighton University School of Law, Omaha NE
- In Bearbeitung

Bar Admissions

California
Admitted: 1972

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