Helicopter: (double rotor) Heinrich Focke, Germany, 1936; (single rotor) Igor Sikorsky, U.S., 1939,Jet propulsion:(engine) Sir Frank Whittle, England, Hans von Ohain, Germany, 1936; (aircraft) Heinkel He 178, 1939 and Microscope:(compound) Zacharias Janssen, The Netherlands, 1590; (electron) Vladimir Zworykin et al., U.S., Canada, Germany, 1932-1939
Hope that helps
inventions , coins and paper money
the first clock was invented.
Benjamin Banneker invented wooden watches
The cotton gin, invented by Eli Whitney.
Blue Jeans were invented by Levi Strauss
what inventions were invented during the years 1996-2008?
bikes
there is no technology inventions in Switzerland but they invented the Swiss watch
they invented the comb
The Taco
inventions? light bulb
She did her inventions in her "laboratory" which was an old rundown garden shed.
I have invented 200 plus inventions. Who and where can I turn?
There are an infinite number of inventions that could be invented in the future. These inventions may include flying cars for example.
what was invented from 1867 -1900
Butter.
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