Kapitsa (1894–1984), Russia – first ultrastrong magnetic field creating techniques, basic low-temperature physics inventions Georgii Karpechenko (1899–1941), Russia – rabbage (the first ever non-sterile hybrid obtained through the crossbreeding) Jamshīd al-Kāshī (c. 1380–1429), Persia/Iran – plate of conjunctions, analog planetary computer Andrew Kay (1919–2014), U.S. – Digital voltmeter Adolphe Kégresse (1879–1943), France/Russia – Kégresse track (first half-track and first off-road vehicle with continuous track), dual-clutch transmission Carl D. Keith (1920–2008), together with John J. Mooney (1930–2020), U.S. – three way catalytic converter Mstislav Keldysh (1911–1978), Latvia/Russia – co-developer of Sputnik 1 (the first artificial satellite) together with Korolyov and Tikhonravov John Harvey Kellogg (1852–1943), cornflake breakfasts John G. Kemeny (1926–1992), together with Thomas E. Kurtz (born 1928), Hungary/U.S. – BASIC (programming language) Alexander Kemurdzhian (1921–2003), Armenia/Russia – first space exploration rover (Lunokhod) Mary Kenner (1912–2006), U.S. – sanitary belt William Saville-Kent (1845–1908), UK/Australia – Pearl culture, see also Mikimoto Kōkichi Kerim Kerimov (1917–2003), Azerbaijan and Russia – co-developer of human spaceflight, space dock, space station Jacques de Kervor (1928-2010), French industrial designer Charles F. Kettering (1876–1958), U.S. – invented automobile self-starter ignition, Freon ethyl gasoline and more Fazlur Khan (1929–1982), Bangladesh – structural systems for high-rise skyscrapers Yulii Khariton (1904–1996), Russia – chief designer of the Soviet atomic bomb, co-developer of the Tsar Bomba Anatoly Kharlampiyev (1906–1979), Russia – Sambo (martial art) Al-Khazini (fl.1115–1130), Persia/Iran – hydrostatic balance Konstantin Khrenov (1894–1984), Russia – underwater welding Abu-Mahmud Khojandi (c. 940–1000), Persia/Iran – astronomical sextant Muhammad ibn Musa al-Khwarizmi (Algoritmi) (c. 780–850), Persia/Iran – modern algebra, mural instrument, horary quadrant, Sine quadrant, shadow square Johann Kiefuss – inventor in Nuremberg in 1517 Marcel Kiepach (1894–1915), Croatia – dynamo, maritime compass that indicates north regardless of the presence of iron or magnetic forces Erhard Kietz (1909–1982), Germany & U.S. – signal improvements for video transmissions Jack Kilby (1923–2005), U.S. – patented the first integrated circuit Al-Kindi (Alkindus) (801–873), Iraq/Yemen – unambiguously described the distillation of wine in the 9th century, cryptanalysis, frequency analysis Petrus Jacobus Kipp (1808–1864), The Netherlands – Kipp's apparatus (chemistry) Steve Kirsch (born 1956), U.S. – Optical mouse Fritz Klatte (1880–1934), Germany – vinyl chloride, forerunner to polyvinyl chloride Yves Klein (1928–1962), France – International Klein Blue Margaret E. Knight (1838–1914), U.S. – machine that completely constructs box-bottom brown paper bags Tom Knight (? – ), U.S. – BioBricks (synthetic biology) Ivan Knunyants (1906–1990), Armenia/Russia – capron, Nylon 6, polyamide-6