In July 2014, Bose sued Beats Electronics for patent infringement, alleging that its "Studio" headphones line incorporated Bose noise cancelling technology. Bose and Apple had collaborated on the SoundDock for iPod music players in 2004. Then in May 2014, Beats was bought by Apple, bringing Bose and Apple into direct competition in the headphone market. In Apple stores, Bose headphones were once the foremost brand offered, but at the time of the lawsuit, Beats products outnumbered Bose. In 2014 total premium headphone market share, Beats held 62%, Bose held 22%. In October 2014, Bose dropped the lawsuit, as Bose and Beats settled out of court without revealing the terms. Apple removed all Bose products from its Apple stores a few days after the lawsuit was settled, but two months later, Bose products returned.