While the first recorded wheeled suitcase was made by an artist in 1928, the modern four-wheeled "gliding" suitcase was patented by Bernard D. Sadow in 1972 (filed in 1970). Sadow’s design featured four casters on the bottom and a flexible strap that allowed the traveler to "tow" the bag like a dog on a leash. However, this design was somewhat unstable and tended to topple over. It wasn't until 1987 that Northwest Airlines pilot Robert Plath invented the two-wheeled "Rollaboard" with a telescoping handle, which became the industry standard for decades. The "four-wheel" design made a major, high-tech comeback in 2004, when Samsonite introduced the first "Spinner-style" suitcases. Unlike Sadow's model, these used 360-degree rotating wheels that allowed the bag to stand upright and be pushed in any direction with minimal effort. By the 2010s, "spinners" had almost entirely taken over the market because they significantly reduced the physical strain on the traveler’s shoulder. Today, in 2026, the 4-wheel spinner is the definitive global standard for travelers of all ages.