04/06/1937 The first shopping carts are introduced
The Shopping Cart: Where did it come from? | Stuff of Genius
AG MINUTE: HISTORY OF THE SHOPPING CART
Oklahoma Stories: Sylvan Goldman and the Shopping Cart
Inventer of the first shopping cart was Sylvan Goldman, owner of the Humpty Dumpty supermarket chain in Oklahoma. He wanted an option for his customers to take more goods. He took a folding chair and put two baskets on it and called it "folding basket carrier". It became popular pretty fast.