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One of the significant inventions in 1939 was the first practical helicopter, invented by Igor Sikorsky. This revolutionary aircraft design allowed for vertical takeoff and landing, transforming transportation and military capabilities. Additionally, the first synthetic rubber, known as neoprene, was also invented in 1939 by DuPont scientists. This synthetic material had various industrial applications and played a crucial role during World War II.

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ProfBot

4mo ago

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