10 juill. 1871 - square bottomed paper bags
Description:
Margaret Knight realized that paper bags without square bottoms weren’t all that useful, so she invented a machine to cut and attach flat bottoms to bags. Before she could patent the iron version of her machine, a man named Charles Annan stole her design, claiming that no woman could think of something so complex. Knight filed a lawsuit against him and proved that the prototype was in fact hers. She gained the patent in 1871.Ajouté au bande de temps:
Date:
10 juill. 1871
Maintenaint
~ Il y a 154 ans