Michael E. Dukes » Member Directory Go back to directory. Michael E. Dukes Dentons Cohen & Grigsby P.C.Patent, Trademark, Copyright, Trade Secret, Litigation Work 625 Liberty Avenue Pittsburgh PA 15222 work Phone: 412-297-4770 Email: michael.dukes@dentons.comINTERNET Website: Website Website: LinkedIn Categories: Attorney Updated 2 years ago.