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Period: to
1930
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The Electron Microscope
Max Knott and Ernst Ruska co-invented this. It uses an electron beam to alluminate whatever it's looking at and produce a magnified image. -
Polaroid Photography
Invented by Edwin Land, This camera was the closest thing the world had to instant photography at the time -
Jet engine
Von Ohain and Ernst Heinkel construct the first jest engine and bench test it. This would lay a path for many modern propulsion engines to be constructed form -
Ballpoint Pen
Invented by Laszlo Biro, This is the earliest pen to use a ball point and has been the baseline for all pens produced since -
The Helicopter
Igor Silorsky creates the first successful Helicopter
