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Patents for John W. Calkins
Patents 1 - 2 of 2
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NumberDatePatenteeTitleType
181,310Aug. 22, 1876J.W. CalkinsImprovement in machines for sawing lathslath making machines
186,795Jan. 30, 1877J.W. CalkinsImprovement in machines for sawing lathslath making machines
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