The way Hugh Herr sees it, he’s in the transportation business. Personal transportation. Herr weaves titanium, silicon, carbon, and nuts and bolts into prosthetic devices for amputees. “Our devices have to work like a car, because of the same profound reliance that people have for locomotion,’’ said Herr, the founder of iWalk, a bionics company based in Bedford. The work is personal, too. Herr lost both of his lower legs 30 years ago in a hiking accident on Mt. Washington.
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