With the introduction of sound technology, Fox moved to acquire the rights to a sound-on-film process. In the years 1925–26, Fox purchased the rights to the work of Freeman Harrison Owens, the U.S. rights to the Tri-Ergon system invented by three German inventors, and the work of Theodore Case. This resulted in the Movietone sound system later known as "Fox Movietone" developed at the Movietone Studio. Later that year, the company began offering films with a music-and-effects track, and the following year Fox began the weekly "Fox Movietone News" feature, that ran until 1963. The growing company needed space, and in 1926 Fox acquired 300 acres (1.2 km2) in the open country west of Beverly Hills and built "Movietone City", the best-equipped studio of its time.