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John R. Mann

Of Counsel

(303) 534-5160
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555 Seventeenth St.
Suite 3400
Denver, CO 80202


J.D., University of Colorado School of Law, 1986

  • Order of the Coif
  • University of Colorado Law Review, Staff Editor and Member, 1984-1986

M.A., University of Colorado, Philosophy, 1983

B.A., cum laude, College of Charleston, Philosophy, 1979

Northwestern University, Medill School of Journalism, 1974-1976


Top Rated Lawyer-AV® Preeminent™, Martindale-Hubbell

Super Lawyers® distinction in Appellate, Civil Litigation: Defense, and Intellectual Property Litigation (2015-2019)


John R. “Jack” Mann was a shareholder with a Denver, Colorado firm for more than 20 years before coming to GRSM. At his former firm, Jack specialized in civil appeals, insurance coverage, and intellectual property litigation. He has more than 100 published appellate decisions in state and federal appellate courts to his credit, along with hundreds more unpublished decisions. Some of his more significant cases established the right of defense counsel to meet with plaintiffs’ treating physicians, the right to discover expert work product, the application of the economic loss rule to construction defect cases, and the non-liability of attorneys for giving legal advice to non-clients. He was also involved in the case testing the constitutionality of the University of Colorado’s athletic drug testing program, the Columbine videogame case, and the case testing the constitutionality of the Colorado Health Care Availability Act. He has also written numerous amicus briefs, including briefs for the American Medical Association, Colorado Bar Association, Colorado Defense Lawyers Association, and other industry and trade organizations.

Jack's experience includes environmental claims as well as an extensive insurance coverage and bad faith practice in both trial and appellate courts. He has handled coverage work for The Hartford, CNA, Catlin, St. Paul, Copic, Blue Cross/Blue Shield, and Mutual of Omaha and recently served as Colorado Coverage Counsel for the W.R. Berkley Companies.

In the field of intellectual property litigation, Jack has handled matters involving alleged infringement of copyrights, trademarks, patents, misappropriation of trade secrets and trade dress, and unfair competition and deceptive practices claims under both federal and state law, including the Lanham Act and Colorado Consumer Protection Act. In addition, he has handled the defense of numerous defamation and invasion of privacy claims, as well as business torts such as abuse of process and tortious interference.


  • Colorado
  • U.S. District Court, District of Colorado
  • U.S. Court of Appeals, Federal, Fifth, Ninth, and Tenth Circuits
  • U.S. Supreme Court


  • Colorado Bar Association
  • Denver Bar Association
  • Colorado Defense Lawyers Association
Publications & Presentations