Martha Thal, US2248289A
Process of Producing Pies, US2248289A.
Image credit: Thal, M. (1939)
On July 8, 1941, Martha Thal of Chicago received a patent for developing a novel method for producing industrial pies. Her process aimed to preserve the aromas of home-baked pies by quickly freezing the unbaked product.
Date of Application: 25 March 1939
Date of Issuance: 8 July 1941
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Francesca Chiaradia
PhD Student in Economics
My research interests include law and economics, economics of innovation, and information economics.