Opal A. Barber, US2509797A
Ventilator.
Image credit: Barber, O.A. (1946)
On May 30, 1950, Opal A. Barber of Oklahoma City, Oklahoma, obtained a patent an improved rooftop ventilator that used wind to help pull stale air out of buildings. Her design featured a rotating hood and a “bullet nose” that boosted suction for better airflow.
Date of Application: 1 October 1946
Date of Issuance: 30 May 1950
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Francesca Chiaradia
PhD Candidate in Economics
My research interests include innovation, law, and information economics.