Levenfeld Pearlstein LLC added Shannon L. Hartzler as a partner in the trusts and estates group.She helps clients solve complex family and business issues at the planning stage and provides guidance to clients on the formation and maintenance of charitable organizations.• Lathrop Gage LLP added George T. Wu as of counsel in the intellectual property group.He has experience in the areas of biomedical-related matters and new technologies. He also counsels clients on patent applications as well as trademark and copyright …