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600,000 BC-AD 1299 : The first inventions -- 1300-1779 : Printing and the spread of ideas -- 1780-1869 : Steam power and the Industrial Revolution -- 1870-1939 : Electric power and the Modern World -- ...
Hundreds of thousands of patents are issued by the U.S. Patent and Trademark Office for new inventions every year. Some of these creations, such as the lightbulb, personal computer, and automobile, ...
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