Now this is a curiousity.
At first the Germans didn't delivered Panzerfausts and Panzerschrecks but in '43 they gave a pair for making studies. As I said the letter inspired the 44M 60 mm handheld rocket launcher but the Panzerfaust also gave ideas to Hungarian military engineers. Luckily we could buy the Nebelwerfer's license and they used the gunpowder of it in several explosives (like in the 60 mm rocket).
The novelty was the detonation which was based on a mechanism that they later called Misnay-Schardin effect. The two researcher discovered it independently, probably the German was the first. Here you can read more about it:
https://en.wikipedia.org/wiki/Misznay%E2%80%93Schardin_effect
The operation of the 44M 60 mm rocket, the 40 mm AT projectile, 43M AT mine and the 44M. "Macelauncher" was based on this effect.