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Patents for John D. Ballou
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
174,142Feb. 29, 1876C.B. MartinImprovement in Nut-Crackersnutcrackers
435,311Aug. 26, 1890C.O. LambertGagemicrometer depth gauges
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