How Clarence Saunders Invented the Modern Self-Service Grocery Store

A 1917 patent for a store layout that allowed customers to walk through aisles and pick their own goods, replacing the traditional over-the-counter service model.

What it covers

This patent describes a specific physical layout for a retail store designed to eliminate the need for clerks to fetch items for customers. It utilizes a one-way path through a series of aisles, forcing customers to pass by all displayed merchandise before reaching the checkout area. By arranging goods on open shelves accessible to the public, the design shifts the labor of gathering products from the store employee to the shopper.

What it doesn't cover

• —Does not cover automated checkout systems or self-scanning technology.
• —Does not cover stores that allow customers to exit without passing through a specific checkout turnstile.
• —Does not cover online grocery ordering or delivery services.

The clever bit

The genius was in the forced-path architecture; by controlling the customer's movement through the store, Saunders ensured every shopper was exposed to every single product on the shelves.

Why it matters

This patent is the blueprint for the modern supermarket. Before Clarence Saunders opened his Piggly Wiggly stores using this design, customers had to wait for a clerk to retrieve every item from behind a counter, which was slow and labor-intensive. This invention fundamentally changed global retail by lowering costs and increasing the volume of goods a single store could sell.

Real-world examples

• 1.Piggly Wiggly stores
• 2.Modern supermarket layouts
• 3.IKEA store navigation paths