Eudora M. Campbell, US782543A
Thread Holder and Cutter for Sewing-Machines.
Image credit: Campbell, E.M. (1904)
On November 28, 1922, Eudora M. Campbell of Wilkes-Barre, Pennsylvania, patented an innovative thread-holding and cutting device for sewing machines. Her design featured a presser bar, a supporting clip, a pair of clamping arms, and a cutting blade, all arranged to make thread cutting and severing more efficient.
Date of Application: 30 July 1904
Date of Issuance: 14 February 1905
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Francesca Chiaradia
PhD Student in Economics
My research interests include law and economics, economics of innovation, and information economics.