1896. On 13 December 1904, Hungarian Sándor Just and Croatian Franjo Hanaman were granted a Hungarian patent (No. 34541) for the world's first tungsten filament lamp. The tungsten filament lasted longer and gave brighter light than the traditional carbon filament. Tungsten filament lamps were first marketed by the Hungarian company Tungsram in 1904. This type is often called Tungsram-bulbs in many European countries. Despite the long experimentation with vacuum tubes at Tungsram company, the mass production of radio tubes begun during WW1, and the production of X-ray tubes started also during the WW1 in Tungsram Company. The Orion Electronics was founded in 1913. Its main profiles were the production of electrical switches, sockets, wires, incandescent lamps, electric fans, electric kettles, and various household electronics. The telephone exchange was an idea of the Hungarian engineer Tivadar Puskás (1844–1893) in 1876, while he was working for Thomas Edison on a telegraph exchange. The first Hungarian telephone factory (Factory for Telephone Apparatuses) was founded by János Neuhold in Budapest in 1879, which produced telephones microphones, telegraphs, and telephone exchanges. In 1884, the Tungsram company also started to produce microphones, telephone apparatuses, telephone switchboards and cables. The Ericsson company also established a factory for telephones and switchboards in Budapest in 1911. Aeronautic industry The first airplane in Austria was Edvard Rusjan's design, the Eda I, which had its maiden flight in the vicinity of Gorizia on 25 November 1909. The first Hungarian hydrogen-filled experimental balloons were built by István Szabik and József Domin in 1784. The first Hungarian designed and produced airplane (powered by a Hungarian built inline engine) was flown at Rákosmező on 4 November 1909. The earliest Hungarian airplane with Hungarian built radial engine was flown in 1913. Between 1912 and 1918, the Hungarian aircraft industry began developing. The three greatest: UFAG Hungarian Aircraft Factory (1914), Hungarian General Aircraft Factory (1916), Hungarian Lloyd Aircraft, Engine Factory at Aszód (1916), and Marta in Arad (1914). During the First World War, fighter planes, bombers and reconnaissance planes were produced in these factories. The most important aero-engine factories were Weiss Manfred Works, GANZ Works, and Hungarian Automobile Joint-stock Company Arad. Rolling stock manufacturers The factories producing rolling stock such as locomotives, steam engines and wagons, but also bridges and other iron structures, were installed in Vienna (Locomotive Factory of the State Railway Company, founded in 1839), in Wiener Neustadt (New Vienna Locomotive Factory, founded in