In 1934 Karl Butter and the aircraft manufacturer Heinkel patented the explosive rivet for aviation use.
Mainly meant for repair of combat damaged aircraft.
There is a 1943 article in a US aviation journal which speaks of this very same development but is featuring it as a US Du Pont development (well, guess wartime allows for such things).
What most people do not know is that all German patents claimed before 1945 were declared something like invalid and got distributed to the business of the Allies. So far so funny.
Question, were these explosive rivets ever used in US aviation and there by the military for repair purposes?
Here a 1945 entry on Du Pont (source internet):