Patrick Brett O'Sullivan
In 1918, during the First World War, he resigned from the state senate to enlist in the United States Navy. Following the war, he was elected as a Democrat to the United States House of Representatives for the Sixty-eighth Congress (March 4, 1923-March 3, 1925). He lost a reelection bid in 1924 and resumed the practice of law and also became an associate professor of law at the Yale Law School
From 1931-1950 he served as a judge of the Connecticut Superior Court. In the years from 1950 to 1957, he was an associate justice of Connecticut Supreme Court. He crowned his legal career when he was named chief justice of the Connecticut Supreme Court in 1957, serving until August 11 of that year when he reached the mandatory retirement age.
In retirement he continued serving as a State trial referee in New Haven and was cochairman of the 1965 state Constitutional Convention. He lived in Orange, where he died on November 10, 1978. He is buried in St. Lawrence Cemetery in West Haven.