08/24/2026
Sometimes the best inventions begin as a lucky accident!
Naval mechanical engineer Richard T. James accidentally invented the childhood stable toy, the Slinky, in 1943 while working on springs to stabilize ship equipment. He knocked one off a shelf and watched it “walk” down gracefully instead of falling to the floor. James demoed his toy at Gimbels department store in 1945, and sold 400 toys in just 90 minutes!
From a naval experiment to the National Toy Hall of Fame, see the official patent for yourself in The American Story exhibit at the National Archives Museum in Washington, DC, or view the patent in our online Catalog.
Plan your visit: visit.archives.gov.
United States Patent and Trademark Office