Lillian R. Kubias, US2521857A
Turn Signaling Device.
Image credit: Kubias, L.R. (1949)
On September 12, 1950, Lillian R. Kubias patented a turn-signaling device with illuminated transparent arms that extended from a vehicle to indicate direction. The system used solenoids and timed circuits to automatically deploy, flash, and retract the signal arms.
Date of Application: 16 March 1949
Date of Issuance: 12 September 1950
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Francesca Chiaradia
PhD Student in Economics
My research interests include law and economics, economics of innovation, and information economics.