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This blue commemorative plaque records: "Greenfield". Former home of Sir John Ambrose Fleming, M.A., D.Sc., F.R.S. (1849-1945) Inventor of the thermonic valve. Designed Poldhu Wireless Station for Marconi, used in his first transatlantic transmission to St. John's Newfoundland in 1901. He designed and lived in this house 1926-1945.
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