Air condition :Willis Carrier
Atomic bomb : J. Robert Oppenheimer
A.K 47 ( Avtomat Kalashnikova) : Mikhail Kalashnikov.
Ballpoint pen : John Loud
Barometer :Torricelli
Bicycle : Kirkpatrick Macmillan
Cinema : Lumière brothers
Computer : Charles babage
Crescograph : Jagadish chandra bose
Dynamo : Michael Faraday
Dynamite : Alfred Nobel
Electric bulb :Edison
Electric fan : Philip H. Diehl
Electric iron : Henry W. Seeley
Electric battery : Alessandro Volta
Electric welder : elisha Thompson
Fountain pen : Lewis Waterman
Galvanometer : André-Marie Ampèr
Hydrogen bomb :Edward teller
Machine gun : Richard gatling
Matches :John walker
Mobile phone :Martin Cooper
Moto car : Karl Friedrich Benz
neutron bomb. : Samuel cohen
Pendulum clock : Christiaan Huygens
phonograph :Thomas Alva Edison
printing : Guttenburg
Radar :Robert Watson-Watt
Radio : Marconi
Radium : Madam curie
Refrigarator : James harrison
Revolver :Samuel colt
Safety razor :C.Gillette
Steam engine : James Watt
Stethoscope :Rene Laennec
Telegraph :Samuel Morse
Telephone :Alexander Graham Bell
Television :John Logie Baird
Tyre :John dunlop
X-Rays :Wilhelm conrad roentgen
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