Assertion: patent | /r/HasProperty | granted on july
Facets:
value: for a method
type: PURPOSE
value: for his invention
type: PURPOSE
Source sentences:
text: The first patent under the Act was granted on July 31, 1790 to Samuel Hopkins for a method of producing potash (potassium carbonate).
text: The first patent was granted on July 31, 1790, to Samuel Hopkins for his invention of "Making Pot and Pearl Ashes.
text: The first patent was granted on July 31, 1790 to Samuel Hopkins for a method of producing potash (potassium carbonate).