– Prolific inventor, Arc lamp and many others William Thomson, 1st Baron Kelvin (1824–1907), UK – Kelvin absolute temperature scale Eric Tigerstedt (1887–1925), Finland – Sound-on-film, triode vacuum tube Kálmán Tihanyi (1897–1947), Hungary – co-inventor of cathode ray tube and iconoscope Mikhail Tikhonravov (1900–1974), Russia – co-developer of Sputnik 1 (the first artificial satellite) together with Korolyov and Keldysh, designer of further Sputniks Gavriil Adrianovich Tikhov (1875–1960), Russia – feathering spectrograph Benjamin Chew Tilghman (1821–1897), U.S. – sandblasting Fedor Tokarev (1871–1968), Russia – TT-33 semiautomatic handgun and SVT-40 self-loading rifle Ray Tomlinson (1941–2016), U.S. – First inter-computer email Evangelista Torricelli (1608–1647), Italy – barometer Alfred Traeger (1895–1980), Australia – Pedal radio Richard Trevithick (1771–1833), UK – high-pressure steam engine, first full-scale steam locomotive Franc Trkman (1903–1978), Slovenia – electrical switches, accessories for opening windows Hans Tropsch (1889–1935), together with Franz Joseph Emil Fischer (1877–1947), Germany – Fischer–Tropsch process (refinery process) Yuri Trutnev (1927–2021), Russia – co-developer of the Tsar Bomb Roger Y. Tsien (1952–2016), together with Osamu Shimomura (1928–2018) and Martin Chalfie (born 1947), U.S. – Discovery and development of Green fluorescent protein Konstantin Tsiolkovsky (1857–1935), Russia – spaceflight Mikhail Tsvet (1872–1919), Russia – chromatography (specifically adsorption chromatography, the first chromatography method) Alexei Tupolev (1925–2001), Russia – the Tupolev Tu-144 (first supersonic passenger jet) Andrei Tupolev (1888–1972), Russia – turboprop powered long-range airliner (Tupolev Tu-114), turboprop strategic bomber (Tupolev Tu-95) Nasīr al-Dīn al-Tūsī (1201–1274), Persia/Iran – observatory, Tusi-couple Sharaf al-Dīn al-Tūsī (1135–1213), Persia/Iran – linear astrolabe Ralph Hart Tweddell (1843–1895), England – portable hydraulic riveter U Shintaro Uda (1869–1976), together with Hidetsugu Yagi (1886–1976), Japan – Yagi–Uda antenna– Lewis Urry (1927–2004), Canada – long-lasting alkaline battery Tomislav Uzelac, Croatia – first successful MP3 player, AMP V Ira Van Gieson (1866–1913), U.S. – Van Gieson's stain (histology) Theophilus Van Kannel (1841–1919), U.S. – revolving door (1888) Vladimir Veksler (1907–1966), Russia – synchrophasotron, co-inventor of synchrotron John Venn (1834–1923), UK – Venn diagram (1881) Auguste Victor Louis Verneuil (1856–1913), France – Verneuil process (crystal growth) Pierre Vernier (1580–1637), France – Vernier scale (1631) Lucien Vidi (1805–1866), France – Barograph Edgar Villchur (1917–2011), U.S. – Acoustic suspension (loudspeaker) Artturi Ilmari Virtanen (1895–1973), Finland – AIV fodder Alessandro Volta (1745–1827), Italy – battery, see also Voltaic pile Bernard Vonnegut (1914–1997), together with Henry Chessin, and Richard E. Passarelli Jr., U.S. – Cloud seeding by silver iodide Ivan Vučetić (1858–1925), Croatia – method of fingerprint