Benjamin Dearborn
Benjamin Dearborn (1754–1838) was a printer and mechanical inventor in Portsmouth, New Hampshire and Boston, Massachusetts in the late 18th and early 19th centuries. His inventions include the gold standard balance, spring scale, grist mill, candlestick, ballot box, perspective drawing machine, letter-press, "musical board for the instruction of the blind," thermoscope, vibrating steelyard balance, and perpendicular lift. Provided by Wikipedia
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