Image: US patents 1790-2008
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Description: Patents Granted 1790-2010 (divided into utility patents, design patents, plant patents, and patents granted to foreign residents)
Title: US patents 1790-2008
Credit: Own work
Author: Spitzl
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC BY-SA 3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0
Attribution Required?: Yes
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