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 Friedrich Bergius
The Bergius process is a method of production of liquid hydrocarbons for use as…
invented by Chuck Hull
Stereolithography (SLA or SL; also known as stereolithography apparatus,…
invented by Stephanie Kwolek
Kevlar (para-aramid) is a heat-resistant and strong synthetic fiber, related to…
invented by Xerox PARC
The idea was first documented in a memo that Robert Metcalfe wrote.
Suggest an invention you think it should be here
Inventions that changed the world