However, before she could place the patent application, she found a man named Charles Annan who had studied her machine while visiting the factory was attempting to a patent machine suspiciously similar to her own. Knight, 33 at the time, filed a patent interference suit against Annan. She played to win, spending $100 a day plus expenses for 16 days of depositions of herself and other key Boston witnesses.
Gayunman, bago siya ay maaaring ilagay ang patent application, siya natagpuan ng isang lalaki na nagngangalang Charles Annan na aral ng kanyang makina habang pagbisita sa factory ay pagtatangka upang isang patent makina paghihinala katulad sa kanyang sarili. Knight, 33 sa panahon, na isinampa ng isang patent suit laban sa panghihimasok Annan.