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.
Charles Plimpton
Charles Bird Plimpton (31 October 1894 – 29 December 1948) was an English inventor and businessman. He invented Bayko in 1933, a plastic building model construction toy, and one of the earliest plastic toys to be marketed. He established Plimpton Engineering in Liverpool, England, to manufacture the toy, which was sold across the world for over 30 years.