1963c – Two-Legged Walker – Meredith Thring (Australian/British)

Source: How to Invent: M.W. Thring and E.R. Laithwaite, 1977. In the first stage of an attempt to make a powered artificial leg I analysed the essential mechanism of human walking and produced the device shown above which walks on two legs by bending the knee as the thigh begins to swing forward and straightening …