1871 CAMPBELL NEW YORK CARVING MACHINE CUTTING TOOL PATENT LITHO 117978

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United States Patent Office. No #117978. We have been told by several patent office employees that the patent office set of the 1871-72 group had been destroyed in the late1870's per a fire. We have located a few remaining partial sets in various closed collections… In 1869 the US Congress decided to change how the patent office was required to report the new inventions for each year.

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