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.
Jesse Armour Crandall
Other inventions by Jesse included toys and non-toys. Various improvements on velocopedes came both from Jesse and his father. One of Jesse's involved use of a newly designed treadle and earned a gold medal at the 1876 Philadelphia Exposition; Crandall's Sandometer or "The beach brought to your home" in 1879 was a rather novel idea. An artificial arm was invented in 1915; however, Jesse did not attempt to patent it - probably from a combination of the money and effort spent on defending earlier patents and a philanthropic viewpoint. He also invented an invalid chair, which President Grover Cleveland's daughter was reported to use, One puzzle was a result of getting two painter's hooks entangled and the difficulty in getting them separated. This type of puzzle was still popular in the 1960s.Charles Martin Crandall