Phyllis E. Charles, US990206A
Foot-Warming Attachment for Electrothermal Garments.
Image credit: Charles, P.E. (1910)
On April 18, 1911, Phyllis Emily Charles of Portland, Oregon, was awarded a patent for a novel foot-wrap for use with electrothermal garments. Unlike earlier fixed designs, her flexible, separable model allowed each foot to move freely and receive independent warming or therapeutic electrical treatment.
Date of Application: 12 October 1910
Date of Issuance: 18 April 1911
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Francesca Chiaradia
PhD Candidate in Economics
My research interests include innovation, law, and information economics.