Her patents covered textile and shoe-making machinery, domestic devices, and even a “sleeve-valve” automobile engine. Knight’s greatest success, however, was the first machine to make the square-bottomed paper bags.
Kanyang patent sakop hinabi at sapatos-paggawa ng makinarya, mga domestic aparato, at kahit isang "manggas-balbula" automobile engine. Pinakamalaking tagumpay Knight, gayunpaman, ay ang unang machine upang gumawa ng mga parisukat bottomed papel bags.