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Aug 14, 1499
Leonardo da Vinci invented moveable barracades
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Jul 12, 1564
Nicholas Conte invented the graphite pencil
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Galileo Galilei invented the thermometer
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Hans Lippershey invented the refracting telescope
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W. Oughted invented the sliding ruler
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James Gregory invented the reflecting telescope
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Bartolomeo Cristofor invented the piano
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Duke de Rechelieu invented mayonnaise
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Count Alessandro Volta invented the chemical battery
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Eli Whitney invented the cotton gin to clean cotton quicker
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Charles and Vincent Chevaler invented the camera
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Samuel Colt invented the colt revolver
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Richard Gatling invented the first machine gun
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John Brownig invented the pump action shotgun
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Orville and Wibur Wright invented the airplane
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Philo Farnsworth invented the television
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Dr. Jonas Salk invented the polio shot
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Steve Jobs invented the iPod
