The S-99 (Russian: -99 ) experimental submarine was the only ship of the Soviet Project 617 submarine class (NATO reporting name: Whale class) that the Soviet Union built during the early Cold War and the only Soviet submarine which had a Walter engine fuelled by high test peroxide (HTP).

Based on that paragraph can we conclude that this sentence is true?
the cold war created over 300 inventions by its end
It's impossible to say