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Best Inventions of the Creative Years: Photos
About this post
Source
Tech
Date
6:45 PM | February 20, 2013
Language
English
Categories
Engineering
URL
http://feedproxy.google.com/~r/DiscoveryNews-Tech-News/~3/LyOzlMjdovQ/best-inventions-creative-years-pictures-130220.htm
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New study finds patents bloomed during key periods in US history.
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