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| The Vacuum Tube |
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| late 1800s - early 1900s |
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| Thomas
Edison (light bulb - 1884) Henry Ford (automobiles - 1896) John Fleming (valve - 1904) Lee DeForest (Audion tube - 1906) |
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| 1908 The Ford Motor Company produces the Model T. |
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| Tayo Usanga |
