The Fleming valve, also called the Fleming oscillation valve, was a thermionic valve or vacuum tube invented in 1904 by English physicist John Ambrose Fleming as a detector for early radio receivers used in electromagnetic wireless telegraphy. It was the first practical vacuum tube and the first thermionic diode, a vacuum tube whose purpose is to conduct current in one direction and block current flowing in the opposite direction.
invented by Soviet Union
Salyut 1 (DOS-1) (Russian: Салют-1) was the world’s first space…
invented by Xerox PARC
The idea was first documented in a memo that Robert Metcalfe wrote.
invented by Herbert A. Gilbert
An electronic cigarette is an electronic device that simulates tobacco smoking.…
invented by Wilson Greatbatch
A cardiac pacemaker (or artificial pacemaker, so as not to be confused with the…
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