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Hubert Booth invented the vacuum in 1901. It has helped to keep our houses clean.
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Willis Haviland Carrier created the first A/C unit in 1902.
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The Wright brothers invented the first airplane in 1903. It has helped us be able to travel the world faster and more conveniently.
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Paul Cornu invented the first helicopter in 1907. It has helped with military operations and general traveling.
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Louis Washington invented instant coffee in 1909. It's something that has helped many people function to stay awake.