Fifty-seven patents were granted during the three years the 1790 Patent Act existed. Three of these patents were granted in 1790, thirty-three in 1791, eleven in 1792, and ten in 1793 before February, which is when the following patent act was adopted. There is little available information regarding the subject matter of these patents, because all of these records along with other documents of the Patent Office were destroyed in the Patent Office Fire of 1836. The first patent was granted on July 31, 1790, to Samuel Hopkins for his invention of “Making Pot and Pearl Ashes.”
