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.
W. H. J. Grout
William Henry James Grout (1839–1915) was a pioneering inventor and manufacturer of bicycles. He patented the "Grout Tension Bicycle" in 1870 which introduced several innovations including hollow forks to save weight, rubber tyres for a better ride and adjustable spokes which could be tensioned to align the wheel. He also devised a portable version of the penny-farthing, whose front wheel could be dismantled into four sections for carrying.