Conversation so far:
When was the first film Jacques Cousteau made?
Jacques-Yves Cousteau and Marcel Ichac took the first ex-aequo prize of the Congress of Documentary Film in 1943, for Par dix-huit mètres de fond.
What was special about the film Par dix-huit mètres de fond that it won an award?
Jacques-Yves Cousteau and Marcel Ichac took the prize of the Congress of Documentary Film in 1943, for the first French underwater film: Par dix-huit mètres de fond.
Did Jacques-Yves Cousteau and Marcel Ichac make another film after Par dix-huit mètres de fond?
In 1943, Jacques-Yves Cousteau and Marcel Ichac made the film Épaves (Shipwrecks).
What made the film Épaves special?
In Épaves, they used two of the very first Aqua-Lung prototypes.

Question: Who created the prototypes?
Self-contained rewrite: Who created the Aqua-Lung prototypes?