When:
July 31, 2017 all-day
2017-07-31T00:00:00-06:00
2017-08-01T00:00:00-06:00

On 31 July 1790, the first US patent office opened its doors. The first patent was issued to Samuel Hopkins of Vermont for a new method of making potash. More information at http://www.uspto.gov/.

Image Credit: Wikipedia Commons

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