Norbert Rillieux

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Created Sugar-refining Evaporation Pan System.

Andre Reboucas

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Invented an Early-version Torpedo.

Robert Pelham

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Invented Tallying Machine for the Census.
Black Inventor - blackinventor.com

John Parker

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Created a Screw for a Tobacco Press.

George Murray

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Created a Cotton-chopping Device.

Benjamin Montgomery

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Developed a Special Steamboat Propeller.