Toshiba invested a total of in R&D in the year ended 31 March 2012, equivalent to 5.2 percent of sales. Toshiba registered a total of 2,483 patents in the United States in 2011, the fifth-largest number of any company (after IBM, Samsung Electronics, Canon and Panasonic). Toshiba is organized into the following principal business groupings, divisions and subsidiaries:   Toshiba has a range of products and services, including air conditioners, consumer electronics (including televisions and DVD and Blu-ray players), control systems (including air-traffic control systems, railway systems, security systems and traffic control systems), electronic point of sale equipment, elevators and escalators, home appliances (including refrigerators and washing machines), IT services, lighting, materials and electronic components, medical equipment (including CT and MRI scanners, ultrasound equipment and X-ray equipment), office equipment, business telecommunication equipment personal computers, semiconductors, power systems (including electricity turbines, fuel cells and nuclear reactors) power transmission and distribution systems, and TFT displays. In October 2010, Toshiba unveiled the Toshiba Regza GL1 21" LED backlit LCD TV glasses-free 3D prototype at CEATEC 2010. This system supports 3D capability without glasses (utilising an integral imaging system of 9 parallax images with vertical lenticular sheet). The retail product was released in December 2010.  4K Ultra HD (3840×2160p) televisions provides four times the resolution of 1080p Full HD televisions. Toshiba's 4K HD LED televisions are powered by a CEVO 4K Quad + dual-core processor. On 19 February 2008, Toshiba announced that it would be discontinuing its HD DVD storage format following defeat in a format "war" against Blu-ray. The HD DVD format had failed after most of the major US film studios backed the Blu-ray format, which was developed by Sony, Panasonic, Philips and Pioneer Corporation. Conceding the abandonment of HD DVD, Toshiba's President, Atsutoshi Nishida said "We concluded that a swift decision would be best [and] if we had continued, that would have created problems for consumers, and we simply had no chance to win". Toshiba continued to supply retailers with machines until the end of March 2008, and continued to provide technical support to the estimated one million people worldwide who owned HD DVD players and recorders. Toshiba announced a new line of stand-alone Blu-ray players as well as drives for PCs and laptops, and subsequently joined the BDA, the industry body which oversees development of the Blu-ray format.