 The first production 'Scaphandre Autonome' - or 'Aqualung' was released in France in 1946 under the identification code "CG45" ("C" for Cousteau, "G" for Gagnan and "45" for 1945, year of the patent).A year later, in 1947, Émile Gagnan and his family emigrated to Montreal, Quebec, Canada and he transferred to the employ of Canadian Liquid Air Ltd.There he set up a lab and proceeded to engineer, design, prototype and patent a very large number of SCUBA and undersea technology firsts, including the direct ancestors of virtually every type of Scuba regulator in common use today.