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Period: to
Inventions
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Ballpoint Pen
A ballpoint pen is a writing instrument with an internal ink reservoir and a sphere for a point created by Ladislo Biro. The story begins in 1888 when John Loud, an American leather tanner, patented a roller-ball-tip marking pen. His invention featured a reservoir of ink and a roller ball that applied the thick ink to leather hides. -
DDT
DDT (dichlorodiphenyltrichloroethane) is an organochlorine insecticide which is a white crystalline solid, tasteless and almost odourless. Dicchlorodiphenyltrichloroethane was invented by a chemist in Switzerland. It has a has a good solubility in most organic solvents, fats, and oil. -
Betatron Turbojet Aircraft
Frank Whittle in the United Kingdom and Hans von Ohain in Germany, developed the concept independently into practical engines. The turbojet is the oldest kind of general-purpose airbreathing jet engine. -
Engine
An engine or motor is a machine designed to convert energy into useful mechanical motion invented by Henry Ford. -
Guided missle
In a modern military, a missile is a self-propelled guided weapon system. Missiles have four system components: targeting and/or guidance, flight system, engine, and warhead. -
Nuclear Reactor
A nuclear reactor is a device to initiate and control a sustained nuclear chain reaction. They are mostly used for generating electricity and for the propulsion of shipsis a device to initiate and control a sustained nuclear chain. It was invented by Ricardo Husada. -
Helicopter
invented by Leonardo da Vinci. It was not until 1942 that a helicopter designed by Igor Sikorsky reached full-scale production, with 131 aircraft built. -
Xerography
Xerography (or electrophotography) is a dry photocopying technique invented by Chester Carlson in 1938. -
Atomic Bomb
The atomic bomb was first tested on July 16th, 1945 near Alamogordo, New Mexico. Two German scientists in Britain by the name of Professor Rudolph Peierls and Otto Frisch, of Birmingham University invented it.
