April 10, 1790 Yes, you invented it, but do you have a Patent?
The US Patent Statute was signed into law on April 10, 1790 by President Washington. The Statute did not create a Patent Office but created a cabinet level committee of the Secretary of State, Secretary of War, and the Attorney General to make decisions over the merit of a petition for patent. Samuel Hopkins received the first US patent for apparatus and process for making potash on July 31, 1970. Other patents that year were issued for a candle making process and a flour-milling machine.
Potash is a manufactured form of salt that contains water soluble potassium (K) used in fertilizers and other products. The above image is for a ‘personal’ electrical body wear patent, I believe it is for masturbation cessation or possibly for stimulation.