Mri 1971 Damadian USA
Neon Lamp 1910 George Claude France
Neutron 1932 Chadwick Britain
Neutron Bomb 1958 Samuel Cohan USA
Nylon 1937 Dr Wallace H Carothers USA
Optical Fibre 1955 Narinder Kapany Germany
Paper AD 105 - China
Pacemaker 1952 Zoll USA is
Pasteurization 1867 Lewis Pasteur France
Pencil 1792 Lacques Nicolas Conte France
Periodic Table 1869 Mendeleyev Russia
Photocopier 1938 Carlson USA
Photoelectric Cell 1893 Julius Elster, Hans F Geitel Germany
Photo Film, Celluloid 1893 Reichenbach USA
Photo Film, Transparent 1884 Goodwin Eastman USA
Photography (On Metal) 1826 J.N. Niepce France
Photography (On Paper) 1835 W.H. Fox Talbot Britain
Photography (On Film) 1888 John Carbutt USA
Piano 1709 Cristofori Italy
Pistol, Revolver 1836 Colt USA
Plutonium Fission 1940 Kennedy, whal,Seaborg,Segre USA
Pop-Up Toaster 1927 Charles Strite USA
Printing Press 1455 Johann Gutenberg Germany
Printing (Rotatory) 1846 Richard Hoe USA
Printing (Web) 1865 William Bullock USA
Proton 1919 Rutherford New Zealand
Quantum Theory 1900 Plank Germany
Radar 1922 AH Taylor and Leo C Young USA
Radiocarbon Dating 1947 Libby USA
Radio Telegrapy 1864 Dr Mohlon Loomis USA
Radio Telegrapy (Trans- 1901 G Marconi Italy
Atlantic)
Rayon 1883 Sir Joseph Swan Britain
Razor (Electric) 1931 Col Jacob Schick USA
Razor (Safety) 1895 King C Gillette USA
Refrigerator 1850 James Harrison, Alexandre USA
catlin
Relativity Theory 1905 Einstein Germany
Rubber (Latex Foam) 1928 Dunlop Rubber Co. Britain
Rubber (Tyres) 1846 Thomas Hancock Britain
Rubber (Vulcanised) 1841 Charles Goodyear USA
Rubber (Waterproof) 1823 Charles Macintosh Britain
Safety Pin 1849 Walter Hunt USA
Safety Razor 1903 King camp Gillette USA
Seatbelt 1959 Volvo Sweden
Self-Starter 1911 Charles F Kettering USA
Ship (Steam) 1775 IC Perier France
Ship (Turbine) 1894 Hon Sir C Parson Britain
Silk Manufacture 50 BC - China
Skyscraper 1882 W Le Baron Jenny USA
Slide Rule 1621 William Oughtred Britain
Spinning Frame 1769 Sir Richard Arkwright Britain
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