It was one of two major film exhibitors in the state from after World War I until the late 1940s, the other being D. Clifford Theatres Limited.
[5] There were a few competitors at that time, but as the era of silent films came to an end around 1929, Ozone and Dan Clifford's Star were the two surviving and dominating owners of cinemas in the suburbs of Adelaide.
[7] The two companies dominated the market in South Australia from after World War I until the late 1940s, but after 1938, Ozone was bigger.
[2] In the same year, they acquired the Lyric Picture Palace in Murray Bridge, renaming it Ozone Theatre.
[21] In November 1937, the Ozone Sport and Social Club first annual picnic was held in Belair National Park.
In March 1938 it had suburban theatres at Glenelg, Port Adelaide, Semaphore, Alberton, Enfield, Prospect, and Marryatville; country cinemas at Port Pirie, Victor Harbor, Murray Bridge, and Renmark; and interstate at Broken Hill (Lenard's Theatre[17]), New South Wales, and at Mildura, Victoria.
[1] Semaphore Cinema, originally in the town hall, was expanded and extensively refurbished in 1929 in Art Deco style, eventually closing in May 1960.
[20] The Ozone Marryatville has been fully restored and is now the Regal Theatre, within the suburb now named Kensington Park.
[26] In 2005 it changed hands and underwent further renovations, while retaining the Art Deco fittings, and in 2020 was acquired by the City of Victor Harbor.
It was featured in a photographic exhibition called Now Showing... Cinema Architecture in South Australia held at the Hawke Centre's Kerry Packer Civic Gallery in April/May 2024.
[28] Sir Ewen McIntyre Waterman was secretary of the South Australian Theatrical Proprietors' Association in 1937; president of the South Australian Motion Picture Exhibitors' Association in 1944; and vice-president of the Federal Cinema Exhibitors' Council of Australia in 1947.