The files of Norman Leonard consist of legal cases brought to court by the law firm on behalf of its clients. For many years he represented the International Longshoreman's and Warehousemen's Union (ILWU) and other Congress of Industrial Organizations (CIO) unions. Over the course of his career he defended Harry Bridges, Communist Party members prosecuted under the Smith Act, conscientious objectors targeted by the Selective Service, and individuals involved in the Free Speech Movement.