When was rolling luggage invented?
Rolling luggage was invented by Bernard D. Sadow in 1970. His invention was described in a patent, numbered 3,653,474, which emphasized the growth of air travel as a motivating use-case. The purported inspiration for attaching wheels directly to the luggage was an observation by Sadow of a porter stacking luggage on a rolling cart.
<START_INST>When was rolling luggage invented?<END_INST><START_CTX><END_CTX><START_A>Rolling luggage was invented by Bernard D. Sadow in 1970. His invention was described in a patent, numbered 3,653,474, which emphasized the growth of air travel as a motivating use-case. The purported inspiration for attaching wheels directly to the luggage was an observation by Sadow of a porter stacking luggage on a rolling cart.<END_A>