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en.wikipedia.org/wiki/Trampoline

A trampoline is a device consisting of a piece of taut, strong fabric stretched over a steel frame ... In 1942, Griswold and Nissen created the Griswold-Nissen Trampoline & Tumbling Company, and began making trampolines commercially in ...

www.independent.co.uk/news/obituaries/george-nissen-inventor-of-the-trampoline-1962316.html

May 4, 2010 ... Nissen left his brother to run his trampoline business when, in 1943, ... At the end of the 1950s, jump centres started to spring up across the US ...

www.nytimes.com/2012/09/30/magazine/who-made-that-trampoline.html

Sep 28, 2012 ... Nissen invented the trampoline in the 1930s, when, as a teenage gymnast, he and his coach created a piece of equipment out of scrap steel ...

www.iwest.k12.il.us/schools/thawville/projects/1900/index_019.html

Q. Who invented the trampoline? George Nissen and Larry Griswold invented the trampoline. Q. What was it used for? The trampoline was used to train tumblers ...

www.ideafinder.com/history/inventions/trampoline.htm

trampoline, gymnastics, Nissen, George Nissen, history, invention, facts, ... The Kid Who Invented the Trampoline: More Surprising Stories About Inventions

www.ask.com/youtube?q=Who+Created+the+Trampoline&v=XhwKtls7vT4
Nov 30, 2015 ... Trampoline is a fun invention, which serves both as a fun attraction for children and teenagers but also a device for a competitive Olympic sport.

www.olympic.org/trampoline-equipment-and-history

The first modern trampoline was built by George Nissen and Larry Griswold around 1934 at the University of Iowa. It was initially used to train tumblers and ...

www.amazon.com/Kid-Who-Invented-Trampoline-Extraordinary/dp/0525466541

Learn how 50 different things, among them false teeth, parking meters and Post-it notes, came to be in The Kid Who Invented the Trampoline: More Surprising ...

www.encyclopedia.com/sports-and-everyday-life/games/games-and-hobbies/trampoline

It became a modern sport in 1936 when the present-day trampoline was developed by American gymnast George Nissen. In the United States, trampoline was ...