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Charles Babbage invented the computer in 1822
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Madome c.j Walker invented the hot comb in 1845
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the telephone was invented in 1876 by Alexander Graham Bell
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hair products were invented in 1876-1919 by Madome c.j Walker
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the traffic light was invented in 1913-1921 by Garret Morgan
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Sir John Harrington invented the toilet in 1596
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Claude Chappe invented the telegraph in 1794