Jacques Cousteau and Pierre-Antoine was released in 1954. During the 1940s, Cousteau is credited with improving the aqua-lung design which gave birth to the open-circuit scuba technology used today. According to his first book, "" (1953), Cousteau started diving with Fernez goggles in 1936, and in 1939 used the self-contained underwater breathing apparatus invented in 1926 by Commander Yves le Prieur. Cousteau was not satisfied with the length of time he could spend underwater with the Le Prieur apparatus so he improved it to extend underwater duration by adding a demand regulator, invented in 1942 by Émile Gagnan. In 1943 Cousteau tried
History of scuba diving to finally become the name of the company, Aqua-Lung/La Spirotechnique, currently located in Carros, near Nice. In 1948 the Cousteau-Gagnan patent was also licensed to Siebe Gorman of England, Siebe Gorman was allowed to sell in Commonwealth countries, but had difficulty in meeting the demand and the U.S. patent prevented others from making the product. This patent was circumvented by Ted Eldred of Melbourne, Australia, who had been developing a rebreather called the Porpoise. When a demonstration of this rebreather resulted in a diver passing out, he developed the single-hose open-circuit scuba system, which separates the first stage and demand