Mamie Trimble, US916901A
Mamie Trimble, US916901A.
Image credit: Trimble, M. (1908)
On March 30, 1909, Mamie Trimble, a resident of Columbus, Kansas, was awarded a patent for developing a novel book holder designed to expedite reading by keeping books open.
Date of Application: 4 August 1908
Date of Issuance: 30 March 1909
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Francesca Chiaradia
PhD Student in Economics
My research interests include law and economics, economics of innovation, and information economics.