Leonardo da Vinci, (1452–1519) Italy – conceptualized a helicopter, a tank, concentrated
solar power, the double hull. Relatively few of his designs were constructed during his
lifetime. Some that were used are an automated bobbin winder and a machine for testing
the tensile strength of wire
Corradino D'Ascanio, (1891–1981) Italy – D'AT3 helicopter; Vespa scooter
Jacob Davis, (1868–1908)
Edmund Davy, (1785–1857)
Humphry Davy, (1778–1829) UK – Davy miners lamp
Joseph Day, (1855–1946) UK – the crankcase-compression two-stroke engine
Lee DeForest, (1873–1961)
Vasily Degtyaryov, (1880–1949) Russia – first self-loading carbine, Degtyaryov-series
firearms, co-developer of Fedorov Avtomat
Akinfiy Demidov, (1678–1745) Russia – co-developer of rebar, cast iron dome, lightning
rod (all found in the Leaning Tower of Nevyansk)
Yuri Nikolaevich Denisyuk, (1927–2006)
Miksa Deri (1854–1938) Hungary – co-inventor of an improved closed-core transformer
James Dewar, (1842–1923)
Aleksandr Dianin, (1851–1918) Russia – Bisphenol A, Dianin's compound
William Kennedy Laurie Dickson, (1860–1935)
Philip Diehl, (1847–1913) U.S. – Ceiling fan, electric sewing machine
Rudolf Diesel, (1858–1913)
Al-Dinawari, (828-896) Persia/Iran – more than a hundred plant drugs
William H. Dobelle, (1943– 2004 ) United States – first functioning artificial eye
Ray Dolby, (1933-) U.S. – Dolby noise-reduction system
Mikhail Dolivo-Dobrovolsky, (1862–1919) Poland/Russia – three-phase electric power
(first 3-phase hydroelectric power plant, 3-phase electrical generator, 3-phase motor and 3-
phase transformer)
Nikolay Dollezhal, (1899–2000)Russia – AM-1 reactor for the 1st nuclear power plant,
other RBMK reactors, VVER pressurized water reactors
Bryan Donkin, (1768–1855) UK – print industry composition roller
Hub van Doorne, (1900–1979)
transmission
Anastase Dragomir, (1896–1966)
Karl Drais, (1785–1851) Germany – dandy horse (Draisine)
Cornelius Drebbel, (1572–1633) The Netherlands – first navigable submarine
Richard Drew, (1899–1980)
John Boyd Dunlop, (1840–1921) UK – first practical pneumatic tyre
Cyril Duquet, (1841–1922)
Alexey Dushkin, (1904–1977) Russia – deep column station
James Dyson, (1947– ) UK – Dual Cyclone bagless vacuum cleaner, incorporating the
principles of cyclonic separation.
