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James Watt was born on 19th January, 1736 in Greenock, a seaport on the Firth of Clyde in Scotland.
Watt patented the application of the sun and planet gear to steam in 1781 and a steam locomotive in 1784, both of which have strong claims to have been invented by his employee, William Murdoch.
Watt was a fellow of the Royal Society of Edinburgh and the Royal Society of London.
The watt is named after James Watt for his contributions to the development of the steam engine, and was adopted by the Second Congress of the British Association for the Advancement of Science in 1889 and by the 11th Conférence Générale des Poids et Mesures in 1960.