John Ambrose Fleming
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Sir John Ambrose Fleming (November 29, 1849 - April 18, 1945) was an English electrical engineer and physicist. He is known for inventing the first thermionic valve or vacuum tube, the diode, then called the kenotron in 1904. He also invented the right hand rule, used in mathematics and electronics. He was born the eldest of seven children of James Fleming DD (d. 1879), a Congregational minister, and his wife, Mary Ann, at Lancaster, Lancashire and baptised on February 11 1850. He was a devout...
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- Nov 29, 1849
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- Apr 18, 1945
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