In the law firms Quarles & Brady LLP added Joshua P. Smith as an associate in its intellectual property practice group. Smith focuses on patent prosecution, counseling, post-issuance proceedings and IP litigation. He was previously with Fitch, Even, Tabin & Flannery LLP. • Hamilton, Thies & Lorch LLP added Thomas P. Duffy and Marcia Owens as partners. They represent clients in commercial real estate matters, working with lenders, investors, owners and developers in retail, industrial, office …