Milton Jeffers – Complete Biography, History, and Inventions

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Milton Jeffers, an agent and broker from New York whose invention, a simple adding device, helped move the world that much closer to a real, functional calculator.

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Milton Jeffers Simple Adding Machine

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Milton Jeffers Farming Inventions

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Milton Jeffers: Marriage, Divorce, Children, and Personal Life

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When did Milton Jeffers die?

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