Inventions of WW2: the Axis side

Check out this French invention. When filed for patent in 1939, France was Allied. When the patent was approved, France was Axis. The patent was for " mobile and shielded device of individual protection against bullets, shrapnel or aerial bombs"

https://patents.google.com/patent/FR864019A/en?oq=FR864019A

A lot of tech was lost after the Fall of France. The patent process made it easier for the Axis to steal Allied tech in France too.

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