He is a partner and member of the firm’s Intellectual Property Litigation and Business Litigation & Dispute Resolution Practices and the Energy Industry Team. Mr. Arntsen represents and counsels clients in patent, trademark and copyright protection and enforcement actions; energy and land use litigation; and general commercial matters. Mr. Arntsen has successfully represented clients in over 40 trials, most to a jury, and has obtained preliminary injunctive or dispositive relief for his clients in scores of other cases. He is listed in The Best Lawyers in America® in the areas of intellectual property litigation, patent litigation, land-use litigation, eminent domain law, and commercial litigation and has been Peer Review Rated as AV® Preeminent™, the highest performance rating in Martindale-Hubbell's peer review rating system.