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Inventions Gallery

Choose from 7 pictures in our Inventions collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


Thermionic valve 1920 - Featured Inventions Image

Thermionic valve 1920 -

Thermionic valve, 1920 - drawing of the valve, resulting from Sir Ambrose Flemings invention of 1904, that revolutionised wireless telephony. Fleming: 29 November 1849 - 18 April 1945

© Lebrecht Music & Arts Photo Library 2008 - All Rights Reserved

Drawing, Early 20th Century, Physicist, Radio, Science, Scientist, Social History, Technology, Thermionic, Twenties, Valve