query: Who invented velcro?
passage: 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.[2] He patented it in 1955 and subsequently refined and developed its practical manufacture until its commercial introduction in the late 1950s.
passage: William Crompton (inventor)
Crompton was brought up as a hand loom cotton weaver and, at an early age, learned the trade of a machinist. While superintendent of a cotton mill in Ramsbottom he made many experiments on cotton looms. He went to Taunton, Massachusetts, in 1836 and devised a loom for the manufacture of fancy cotton goods, receiving a patent on 23 November 1837 (U.S. Patent 491). In this loom one part of the warp was depressed while the other was lifted, instead of allowing one part to remain stationary, thus securing more room for the passage of the shuttle. Another feature of it was an endless loop pattern chain, which, with its peculiar apparatus, operated the warp. This allowed many more pattern sequences and made them much easier to change.