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.
Mario Maccaferri
Mario Maccaferri (1900–1993) was an Italian luthier, classical guitarist, businessman, and inventor. He is noted for designing the guitar favored by jazz musician Django Reinhardt, and for inventing the plastic clothespin, plastic bath and kitchen tiles and the plastic Islander ukulele which sold millions of copies in the mid-1900s. From 1939 he lived and worked in the United States. As of 2016 his daughter Elaine still runs the family company French American Reeds Inc.