system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
When was rolling luggage invented?


assistant
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.