1958 US–UK Mutual Defence Agreement as an atomic spy, caused the proposal to be dropped. The June 1951 defection of Donald Maclean, who had served as a British member of the Combined Policy Committee from January 1947 to August 1948, reinforced the Americans' distrust of British security arrangements. The first British atomic bomb was successfully tested in Operation Hurricane on 3 October 1952, but although it was more advanced than the American bombs of 1946, Britain was still several years behind in nuclear weapons technology. The United States conducted Ivy Mike, the first nuclear test of a true thermonuclear device (also known as a hydrogen
Atomic Energy Generation Device Case Atomic Energy Generation Device Case The "Atomic Energy Generation Device "Case (原子力エネルギー発生装置事件) is a 1969 decision of the Supreme Court of Japan concerning the patentability of a method of transformation of atomic nuclei. All members of the patent family had been granted in other countries, and the Japan Patent Office (JPO) did not find any prior art which could destroy the novelty and inventive step of claimed inventions. However, the JPO rejected the patent application as being lack of industrial safety requirements. This is the first Japanese Supreme Court case concerning patentable subject matter. In 1940, the "Commissariat à l'énergie