The impeccably-dressed South Korean flipped a tyre sideways, and with a deft sweep snapped a curious, pastel-shaded device onto the hub.
Ryu Dae Ryeong with his "Running Tortoise" snowchain at the International Exhibition of Inventions in Geneva on April 10, 2013. The event has drawn 725 exhibitors from 45 countries, with lone inventors making up a quarter.
"Fitted in seconds," he said with a flourish, drawing nods of approval from Swiss onlookers all too used to their annual battle to preserve their fingers as they fix snow chains during the Alpine winter.
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