Secretary of State Thomas Jefferson signs the second U.S. Patent Act, which played a signal role in the commercial development of the United States. A key difference between this act and the one it replaced was that, in addition to new inventions, patents could be issued for improvements to existing products. The measure helped foster American innovation, successfully ushering the nation into the Industrial Revolution. We locate no other signed copies of this milestone act.

“That the director of the mint…purchase a quantity of copper...and…cause the copper...to be coined at the mint into cents and half cents...thence to issue into circulation….

That after the expiration of six calendar months from the time when there shall have been paid into the treasury by the said director, in cents and half cents, a sum not less than fifty thousand dollars … no copper coins or pieces whatsoever, except the said cents and half cents, shall pass current as money, or shall be paid, or offered to be paid or received in payment for any debt … and all copper coins or pieces, except the said cents and half cents, which shall be paid or offered to be paid or received in payment contrary to the prohibition aforesaid, shall be forfeited, and every person by whom any of them shall have been so paid … shall also forfeit the sum of ten dollars…”