Velcro
Swiss electrical engineer George de Mestral invented his first touch fastener when, in 1941, he went for a walk in the woods and wondered why Burdock seeds clung to his coat and dog. He discovered it could be turned into something useful. He patented it in 1955 and subsequently refined and developed its practical manufacture until its commercial introduction in the late 1950s.
List of Dutch inventions and innovations
Like the invention of pendulum clock, Huygens' spiral hairspring (balance spring) system of portable timekeepers, helped lay the foundations for the modern watchmaking industry. The application of the spiral balance spring for watches ushered in a new era of accuracy for portable timekeepers, similar to that which the pendulum had introduced for clocks. From its invention in 1675 by Christiaan Huygens, the spiral hairspring (balance spring) system for portable timekeepers, still used in mechanical watchmaking industry today.