Kaja P. Togstad, US1226414A
Spring-Tire.
Image credit: Togstad, K.P. (1916)
On May 15, 1917, Kaja P. Togstad of Maddock, North Dakota, patented a spring-based tire made entirely of nested coil springs. The graduated springs provided shock absorption while also acting as anti-skid elements by gripping the ground as the wheel rolled.
Date of Application: 30 October 1916
Date of Issuance: 15 May 1917
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Francesca Chiaradia
PhD Candidate in Economics
My research interests include innovation, law, and information economics.