1971 – 3-legged Walker – Grundmann & Seireg (American)
Shown above is the original three legged walking machine. Contrary to above caption, the 3-legged walker was developed in 1971. Van Derhei, Jack (ed.) / The Wisconsin engineer Volume 77, Number 2 (November 1972) Sanborn, Steve Everyone should walk, pp. 8-9 During the 1971 Engineering Exposition people on this campus were exposed for the first time …
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