Was the aircraft-carrier crash barrier a Royal Navy invention?
Short answerIts history is evolutionary: an American appears in the early written record, Britain may have implemented a version first, and French and Japanese ideas also contributed.
NotesThe development history distinguishes proposing an idea, implementing it, and adapting someone else's concept. Different national versions appeared close enough together that assigning a single inventor obscures the exchange of practice. The useful lesson is that carrier safety systems evolved through multiple navies solving the same operational problem rather than through one isolated breakthrough.