14 mars 1794 - cotton gin
Description:
Eli Whitney (1765–1825) applied for a patent of his cotton gin on October 28, 1793; the patent was granted on March 14, 1794, but was not validated until 1807. Whitney's patent was assigned patent number 72X.Ajouté au bande de temps:
Date:
14 mars 1794
Maintenaint
~ Il y a 230 ans
