Came to the United States, 1939, naturalized, 1945. Clerk, assistant judge Austrian Court Justices, 1929-1938, judge, 1933-1938. Research assistant New York State Law Revision Committee, 1942-1944.
Admitted to New York bar, 1945. Associate firm Cravath, Swaine & Moore, New York City, 1944-1948. Walter Perry Johnson professor of law University of California at Berkeley Law School, since 1948.
Honorary professor private international law U. Vienna, 1960-1974.
Author: Schuldhaftung, 1936. Negligence Without Fault, 1952. Full-Aid Insurance, 1954.
Treatise on Conflict of Laws, 1962. Conflicts in a Nutshell, 3d edit., 1973. Private International Law, 2 vols., 1967, 73.
Psychoanalytic Jurisprudence, 1971, German edit., 1973. Contributor numerous articles to professor journals Associate editor American Journal Comparative Law, 1954-1971, consultant, 1971-1974.