Ancient Inventions

28. List of inventors
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29. James Hargreaves
    
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30. Academic Kids Online Encyclopedia
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    http: //academickids.com/encyclopedia/c/ci/cinemato...
    
    
31. Saxophone
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32. Radar
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33. Steve Pasjack
    
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34. Karl Drais
    
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35. Vacuum flask
    
    http: //academickids.com/encyclopedia/v/va/vacuum_f...
    
    
36. Joseph Swan
    
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