(CNN) -- It's like a chair that isn't there, but magically appears whenever you need it. It's called the Chairless Chair and you wear it on your legs like an exoskeleton: when it's not activated, you ...
This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. It’s like a chair that isn’t there, but ...
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