Air Liquide S.A. is a French multinational company which supplies industrial gases and services to various industries including medical, chemical and electronic manufacturers. Founded in 1902, Air Liquide is the second largest global supplier of industrial gases by revenues and has operations in over 70 countries. The company's headquarters are in the 7th arrondissement of Paris. It also has major offices in Japan, Houston, Newark, Delaware, New Delhi, Frankfurt, Shanghai and Dubai. The company's research and development targets the creation of industrial gases, and gases that are used in products such as healthcare items, electronic chips, foods, and chemicals. The major R&D groups within Air Liquide focus on analysis, bioresources, combustion, membranes, modeling, and the production of hydrogen gas. Air Liquide owned the patent for Aqua-Lung until it expired. Wikipedia