US Patent #1 is issued

July 31, 1790

US Patent #1 is issued

The first patent issued in the US was received by Samuel Hopkins of Philadelphia, Pennsylvania, on July 31, 1790, for an improvement "in the making Pot ash and Pearl ash by a new Apparatus and Process." His was one of only three issued that first year.

http://www.me.utexas.edu/~longoria/paynter/hmp/The_First_Patent.html

http://www.uspto.gov/web/offices/ac/ido/oeip/taf/h_counts.htm