Emili Sabaté [1936-2006] was a prominent caver from Barcelona. He started making caving equipment in 1952, and initially sold his products directly to caving clubs. His products included helmets, carbide lamps, cable ladders, descenders, and ascenders. In 1961 he started selling some of his products in the Saber mountaineering equipment store in Barcelona.
Sabaté eventually formed EMILSA (derived from his name) to take control of his own sales and distribution. We do not know the exact date that he founded the company, but his trademark registration application was dated May 12, 1972. The application required some minor corrections, and it wasn't approved until March 17, 1977.
Ref.: José Manuel Sanchis. “Lámparas de Mina Españolas: Carbureros de Emili Sabaté, (EMILSA).” Uploaded to https://issuu.com/malacate/docs/emilsa by Jesus Alonzo, August 5, 2021.