Editing List of inventors (section)

===K===
* [[Mikhail Kalashnikov]] (1919–2013), Russia – [[AK-47]] and [[AK-74]] assault rifles (the most produced ever)
* [[Bob Kahn]] (born 1938), together with [[Vint Cerf]] (born 1943), U.S. – [[Internet Protocol]] (TCP/IP)
* [[Dawon Kahng]] (1931–1992), South Korea, together with [[Simon Sze]] (1936–2023), Taiwan/U.S. – [[Floating-gate MOSFET]]
* [[Dean Kamen]] (born 1951), U.S. – Invented the [[Segway HT]] scooter and the [[IBOT]] Mobility Device
* [[Heike Kamerlingh Onnes]] (1853–1926), Netherlands – [[helium|liquid helium]]
* [[Nikolay Kamov]] (1902–1973), Russia – armored battle [[autogyro]], [[Kamov|Ka]]-series [[coaxial rotor]] [[helicopter]]s
* [[Pyotr 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), [[History of Iran|Persia]]/[[Iran]] – plate of [[Conjunction (astronomy and astrology)|conjunctions]], analog planetary [[Analog computer|computer]]
* [[Andrew Kay]] (1919–2014), U.S. – [[Voltmeter#Digital voltmeter|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#Types|catalytic converter]]
* [[Mstislav Keldysh]] (1911–1978), [[Latvia]]/Russia – co-developer of [[Sputnik 1]] (the first artificial satellite) together with [[Sergey Korolyov|Korolyov]] and [[Mikhail Tikhonravov|Tikhonravov]]
* [[John Harvey Kellogg]] (1852–1943), [[corn flakes|cornflake breakfasts]]
* [[John G. Kemeny]] (1926–1992), together with [[Thomas E. Kurtz]] (1928–2024), Hungary/U.S. – [[BASIC]] (programming language)
* [[Alexander Kemurdzhian]] (1921–2003), [[Armenia]]/Russia/USSR – first space exploration [[Rover (space exploration)|rover]] ([[Lunokhod programme|Lunokhod]])
* [[Mary Kenner]] (1912–2006), U.S. – [[sanitary napkin|sanitary belt]]
* [[William Saville-Kent]] (1845–1908), UK/Australia – [[Cultured pearl|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), France – industrial designer
* [[Charles F. Kettering]] (1876–1958), U.S. – invented automobile self-starter ignition, [[Freon]] [[Tetra ethyl lead|ethyl gasoline]] and more
* [[Fazlur Khan]] (1929–1982), [[Bangladesh]] – structural systems for high-rise [[skyscraper]]s
* [[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), [[History of Iran|Persia]]/[[Iran]] – [[hydrostatic balance]]
* [[Konstantin Khrenov]] (1894–1984), Russia – [[underwater welding]]
* [[Abu-Mahmud Khojandi]] (c. 940–1000), [[History of Iran|Persia]]/[[Iran]] – [[sextant (astronomical)|astronomical sextant]]
* [[Muhammad ibn Musa al-Khwarizmi]] (Algoritmi) (c. 780–850), [[History of Iran|Persia]]/[[Iran]] – [[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
* [[Mary Dixon Kies]] (1752–1837), U.S. – new technique of weaving straw with silk and thread to make hats
* [[Erhard Kietz]] (1909–1982), Germany & U.S. – signal improvements for video transmissions<ref>{{cite web |url=http://www.freepatentsonline.com/result.html?query_txt=Erhard+Kietz&sort=relevance&srch=top&search= |title=FPO IP Research & Communities |publisher=Freepatentsonline.com |access-date=2012-10-22 |archive-date=2015-12-13 |archive-url=https://web.archive.org/web/20151213163341/http://www.freepatentsonline.com/result.html?query_txt=Erhard+Kietz&sort=relevance&srch=top&search= |url-status=live }}</ref>
* [[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)
* [[Semyon Kirlian]] (1898–1978), Armenia/USSR – [[Kirlian photography]]
* [[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 (scientist)|Tom Knight]] (?), U.S. – [[BioBrick]]s (synthetic biology)
* [[Ivan Knunyants]] (1906–1990), [[Armenia]]/Russia/USSR – Soviet [[chemical weapon]]s, capron, [[Nylon 6]], polyamide-6
* [[Robert Koch]] (1843–1910), Germany – method for culturing bacteria on solid media
* [[Willem Johan Kolff]] (1911–2009), Netherlands – artificial kidney [[hemodialysis]] machine
* [[Rudolf Kompfner]] (1909–1977), U.S. – [[Traveling-wave tube]]
* [[Konstantin Konstantinov]] (1817/1819–1871), Russia – device for measuring flight speed of [[projectile]]s, [[Ballistic missile|ballistic]] rocket [[pendulum]], [[launch pad]], rocket-making machine
* [[Sergei Korolev]] (1907–1966), [[USSR]] – first successful [[intercontinental ballistic missile]] ([[R-7 Semyorka]]), [[R-7 (rocket family)|R-7 rocket family]], [[Sputnik]]s (including the [[Sputnik 1|first Earth-orbiting artificial satellite]]), [[Vostok program]] (including the [[Vostok 1|first human spaceflight]])
* [[Nikolai Korotkov]] (1874–1920), [[Russian Empire]] – auscultatory technique for [[blood pressure]] measurement
* [[Semyon Korsakov]] (1787–1853), [[Russian Empire]] – [[punched card]] for information storage
* [[Mikhail Koshkin]] (1898–1940), Russia – [[T-34]] medium tank, the best and most produced tank of World War II<ref>{{cite web |first=George |last=Parada (n.d.) |url=http://www.achtungpanzer.com/t34.htm |title=Panzerkampfwagen T-34(r) |publisher=Achtungpanzer.com |access-date=November 17, 2008 |archive-date=June 10, 2008 |archive-url=https://web.archive.org/web/20080610073152/http://www.achtungpanzer.com/t34.htm |url-status=live }}</ref>
* [[Ognjeslav Kostović Stepanović|Ognjeslav Kostović]] (1851–1916), [[Serbia]]/Russia – arborite (high-strength [[plywood]], an early plastic)
* [[Gleb Kotelnikov]] (1872–1944), Russia – [[knapsack parachute]], [[drogue parachute]]
* [[William Justin Kroll]] (1889–1973), Luxemburg/U.S. – [[Kroll process]]
* [[Alfred Krupa]] (1915–1989), [[Yugoslavia]] – the modern wheeled suitcase, a glass-bottom boat, the skis for use in walking on water, a folding canvas catamaran
* [[Aleksey Krylov]] (1863–1945), Russia – [[gyroscope|gyroscopic]] [[Damping ratio|damping]] of ships
* [[Ivan Kulibin]] (1735–1818), Russia – egg-shaped clock, [[candle]] [[searchlight]], [[elevator]] using screw mechanisms, a ''[[self-rolling carriage]]'' featuring a [[flywheel]], [[brake]], [[gear box]], and [[bearing (mechanical)|bearing]], an early [[optical telegraph]]
* [[Shen Kuo]] (1031–1095), China – improved [[gnomon]], [[armillary sphere]], [[Water clock|clepsydra]], and sighting tube
* [[Igor Kurchatov]] (1903–1960), Russia – [[Soviet atomic bomb]], first [[nuclear power plant]], first [[nuclear reactor]]s for [[submarine]]s and [[Nuclear marine propulsion|surface ships]]
* [[Thomas E. Kurtz]] (1928-2024), together with [[John G. Kemeny]] (1926–1992), U.S./Hungary – [[BASIC]] (programming language)
* [[Raymond Kurzweil]] (born 1948), [[Optical character recognition]]; [[flatbed scanner]]
* [[Ken Kutaragi]] (born 1950), Japan – [[PlayStation]]
* [[Stephanie Kwolek]] (1923–2014), U.S. – [[Kevlar]]
* [[John Howard Kyan]] (1774–1850), Ireland – process of Kyanization used for [[wood preservation]]