In the 1930s a grocery store owner from Oklahoma called Sylvan Goldman came up with a novel way for shoppers to move around larger volume of groceries. In those days shoppers used baskets, which were heavy and offered only a limited amount of sales.
Goldman and one of his employees got a patent for "the Folding Basket Carriage for self-service stores" in 1940. Goldman tried his best to prevent shoppers using baskets but this didn't seem to work.
Eventually after many demonstrations people started to 'get it' and the modern shopping trolleys or carts as the Americans call them are descended from the invention of Sylvan Goldman.
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