 In 1918, Spain granted a patent for the pressure cooker to José Alix Martínez from Zaragoza.Martínez named it the "olla exprés", literally "express cooking pot", under patent number 71143 in the "Boletín Oficial de la Propiedad Industrial".In 1924, the first pressure cooking pot recipe book was published, written by José Alix and titled "360 fórmulas de cocina Para guisar con la 'olla expres'", or "360 recipes for cooking with a pressure cooker".