Mark R. Grossmann has always had a global perspective.The partner and head of Katten Muchin Rosenman LLP’s corporate department oversees the firm’s transactional work and engages with partners from Los Angeles to New York; from Chicago to D.C. and Dallas to London.But he also has a historical and deeply personal tie to one city in particular — Shanghai.Grossmann’s ancestors were among the thousands of Jewish refugees who fled Nazi-occupied Europe using visas distributed by Ho Feng-Shan, the Republic …