The first modern trampoline was built by George Nissen and Larry Griswold around 1934. Nissen stated that the name came from the Spanish trampolín meaning a diving board. He first heard the word on a demonstration tour in Mexico in the late 1930s and decided to use an anglicized form as the trademark for the apparatus.
The term trampoline was originally a trademarked product name. It has since lost its trademark and has become a generic term.