sentences:  CKMX was first licensed as a broadcasting station, with the original call sign CFCN, to W. W. Grant Radio, Ltd. of Calgary, Alberta in May 1922.However, the station's founder, William Walter Westover Grant, already had extensive experience with radio development, and a 1923 company advertisement credited him with 13 years of work designing and building radio apparatus, as well as "The construction and installation of the greater portion of Radio-telephone apparatus used by the Royal Air Force during the war", in addition to "The construction of seven commercial and government Radio Stations, including the famous 'High River' Station".Grant served in the British Royal Air in France during World War I, where he gained experience installing and maintaining radio equipment.