Alexander Graham Bell, Rilevatore di Metalli, 1891 Foto stock - Alamy
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Alexander Graham Bell developed a metal detector as a last ditch effort to locate a bullet lodged in the chest of American President James Garfield in 1881 | The Vintage News
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Alexander Graham Bell, Rilevatore di Metalli, 1891 Foto stock - Alamy
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G.E (Genius Engineers) - MasKingTapE http://inventors.about.com/od/pstartinventions/a/Metal_Detector.htm In 1881, Alexander Graham Bell invented the first metal detector. As President James Garfield lay dying of an assassin's bullet, Alexander Graham ...
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Alexander Graham Bell (1847 – 1922) was an Scottish-born scientist, engineer and innovator who is credited with inv… | Cell phone radiation, Graham bell, Inventions
Alexander Graham Bell developed a metal detector as a last ditch effort to locate a bullet lodged in the chest of American President James Garfield in 1881 | The Vintage News
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