The Chicago office of Duane, Morris LLP has brought on 10 new lawyers this year. The firm’s Chicago office initially opened in 1999 with 11 lawyers. It now has 52 attorneys. A major reason for the jump is Duane, Morris’ success in gaining recognition as a Chicago brand, said David B. Yelin, the local managing partner. “We had a lot of trouble with ‘Duane who?’” he said. “Now that we have had an office here in Chicago for 15 years, we’ve gotten to be known as a firm …