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jan 1, 1904 - Invention of the Thermionic Valve
Description:
The Thermionic Valve was created by John Ambrose Fleming in 1904.
(Found in the videos from Section 3.1)
Added to timeline:
28 Sep 2018
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Module 3.2 for CSC
Date:
jan 1, 1904
Now
~ 120 years ago