M. Brian McMahon

M. Brian McMahon: Attorney with The Law Offices of M. Brian McMahon


Extern to Judge Ozell M. Trask, U.S. Court of Appeals, Ninth Circuit, 1977. Staff Attorney and law clerk to Judge Ozell M. Trask, U.S. Court of Appeals, Ninth Circuit, 1978-1979. EXPERT WITNESS: United States Congressional Hearings; Government Management; Information and Technology Subcommittee of the Committee on Government Reform and Oversight; House of Representatives, June 17, 1996; Energy and Mineral Resources Subcommittee of the Committee on Resources; House of Representatives April 23, 1998; Energy, Research, Development, Production and Regulation Subcommittee of the Committee on Energy and Natural Resources, United States Senate, June 11, 1998. Energy and Mineral Resources Subcommittee of the Committee of Resources, 2001. PUBLICATIONS: "Beware of Leases that Require Arbitration and Prohibit Class Actions," ROAR (Royalty Owners Action Report), May 2012; Tying Law: The Clash Between the Supreme Court and Lower Courts," Competition, The Journal of the Antitrust and Unfair Competition Section of the State Bar of California, Vol. 16, No. 2, Fall/Winter 2007; Co-Author, Chapter 9, 2011 and 2012 updates, "Antitrust and Unfair Competition in Regulated Industries," co-author Chapter 13, "Exemptions, Immunities, and Other Defenses to Antitrust Liability," and peer reviewer for California Antitrust & Unfair Competition Law, IV Ed.; PRESENTATIONS: "Lessor/Lessee Allocation of Post-Production Costs: A Survey," National Association of Royalty Owners (NARO), 10/21/11; "Clayworth v. Pfizer, Rejected the Pass-On Defense, or Did It?" panel moderator, Antitrust and Unfair Business Practices Section of LACBA, 3/10/11; "How to Avoid Prison, Fines and Damage Awards for Violations of the Antitrust Laws," to Southern California Monte Jade Science and Technology Association, 3/2/11; "Crude Oil and Natural Gas Royalties," for Agreements and Disputes in Oil and Gas Production, HalfMoon Seminars, 10/21/10; "Natural Gas Anti-Trust Cases: A Perspective from the Participants," at Antitrust and Unfair Competition Practices Section of Los Angeles County Bar Association" 1/17/07; "At Sword's Point-Emerging Issues in the Interface of Intellectual Property, New Technology and Antitrust," panel moderator, Antitrust and Unfair Competition Practices Section of LACBA, June, 2008; "Is there a Future for Posted Prices?" to the Natural Stripper Well Association, 10/95.

Rocky Mountain Mineral Law Foundation; Association of Business Trial Lawyers.

Areas of Practice (10)

  • Business Litigation
  • Oil, Gas and Geothermal
  • Antitrust
  • Environmental Law
  • Civil Appeals
  • Unfair Competition
  • Unclaimed Property Law
  • Preemption
  • Filed Rate
  • Antitrust Opinion Letter

Education & Credentials

Contact Information:
213-628-9800  Phone
University Attended:
Queen of Apostles Seminary and College, B.A., 1963; University of Wisconsin-Madison, Ph.D., 1972
Law School Attended:
University of California at Los Angeles, J.D., 1978
Year of First admission:
1978, California
State Bar of California (Sections: Antitrust and Unfair Competition, Litigation); Los Angeles County Bar Association (Sections: 7/2011-6/2012 Chair and member of the Executive Committee of the Antitrust and Unfair Business Competition; Litigation); NARO (National Association of Royalty Owners); ABTL (Association of Business Trial Lawyers); Rocky Mountain Mineral Law Foundation.
Special Agencies:
Mineral Management Service, U.S. Department of the Interior, CA State Lands Comission.
Birth Information:
East Orange, New Jersey, 1942
Reported Cases:
City of Long Beach v. Standard Oil Co., 872 F.2d 1401 (9th Cir. 1989); California v. Chevron Corp., 872 F.2d 1410 (9th Cir. 1989); City of Long Beach v. Exxon Corp., 1998 U.S. App. Lexis 12206 (Fed. Cir. 1998); Ampac JV Group v. GMC, Cal. App. Lexis 10776 (2002).
Payment Information:
  • Free Initial Consultation
  • Fixed Hourly Rates
  • Peer Reviews

    • 5.0/5.0
    • A Martindale-Hubbell Peer Rating reflects a combination of achieving a Very High General Ethical Standards rating and a Legal Ability numerical rating.

    *Peer Reviews provided before April 15, 2008 are not displayed.

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    Pasadena, California

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