# 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. - **Patent:** US 1242872 - **Original title:** Self-serving store. - **Owner:** Individual - **Granted:** 1917 - **Status:** Public domain (expired) - **Times cited:** 22 - **Field:** ecommerce, mechanical ## What it does 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 does NOT 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. ## Real-world examples 1. Piggly Wiggly stores 2. Modern supermarket layouts 3. IKEA store navigation paths ## 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. ## Frequently asked questions ### What does How Clarence Saunders Invented the Modern Self-Service Grocery Store cover? 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. ### Who owns patent US 1242872? Individual owns this patent, granted in 1917. ### When does this patent expire? This patent has expired and is now in the public domain — anyone can use the invention freely. ### What is patent US 1242872 cited by? This patent has been cited by 22 later patents that build on its ideas. ### What problem does this patent solve? 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. ### What does this patent NOT cover? Does not cover automated checkout systems or self-scanning technology. **Full plain-English explainer:** https://patentbrief.org/patent/us/1242872/self-service-grocery-store-saunders **Original patent:** https://patents.google.com/patent/US1242872 --- _Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._ ## Related patents Semantically similar inventions in the PatentBrief corpus: - [How Sylvan Goldman Invented the Modern Grocery Shopping Cart](https://patentbrief.org/patent/us/2196914/shopping-cart-goldman) — A 1940 patent for a folding metal frame designed to hold two wire baskets, enabling shoppers to carry more items than their arms could hold. - [How Online Stores Automatically Block Illegal Alcohol and Tobacco Deliveries](https://patentbrief.org/patent/us/7801772/amazon-recommendations) — A system that checks if your online order of alcohol or tobacco is legal to deliver at your chosen time based on local laws. - [How Square Syncs Inventory Between Physical Shops and Online Stores](https://patentbrief.org/patent/us/10192220/square-capital) — A system that lets store owners toggle items between online and physical sales channels using a single dashboard to keep stock counts accurate everywhere. - [How James Ritty's First Cash Register Tracked Sales](https://patentbrief.org/patent/us/271363/cash-register-ritty) — This 1883 patent describes an early mechanical cash register invented by James Ritty, designed to record sales transactions and display the total amount, helping businesses prevent employee theft and track daily income. - [How Websites Can Sell Items from Other Sites Without Redirecting Users](https://patentbrief.org/patent/us/9792375/facebook-privacy-checkup) — A method for a website to display and process purchases for items listed on a completely different website, allowing users to buy products without ever leaving the page they are currently browsing.