Giles Rich, one of the fathers of U.S. patent law and the oldest active federal judge in U.S. history, died Wednesday. He was 95.

Rich had been a member of the Federal Circuit U.S. Court of Appeals since its creation in 1982. In 1956, President Dwight Eisenhower appointed Rich to the Federal Circuit’s predecessor court, the U.S. Court of Customs and Patent Appeals (CCPA). The CCPA merged with the U.S. Court of Claims to form the Federal Circuit.