Hall Aluminium Co
Founded 1927 to develop a prototype naval flying-boat based on the hull design of Britain's Felixstowe F.5 for the U.S. Naval Aircraft Factory. The twin-engined Hall PH-1 was superseded by PH-2 and PH-3 variants which served in small numbers with the U.S. Coast Guard during the Second World War. In 1936 Hall flew the XP2H-1 four-engined patrol bomber, largest American-built flying-boat at that time.