6 March 1945. George Nissen of Cedar Rapids, Iowa, received a patent for the first modern trampoline.
How the Trampoline Came to Be, article from Smithsonian Magazine     https://www.smithsonianmag.com/innovation/how-trampoline-came-be-180974343/

TRAMPOLINE   -   Birds of Chicago    https://www.youtube.com/watch?v=JEKW5wGiG_8&list=RDJEKW5wGiG_8&start_radio=1
TRAMPOLINE   -   Ruby Roberts    https://www.youtube.com/watch?v=XvdseKHhrIQ&list=RDXvdseKHhrIQ&start_radio=1
TRAMPOLINE  - The Spencer Davis Group       https://www.youtube.com/watch?v=BDUGshgtAX8&list=RDBDUGshgtAX8&start_radio=1
TRAMPOLINE   - The Unlikely Candidates      https://www.youtube.com/watch?v=HEOKviQPqIw