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Patents for Chicago Screw Co.
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
168,643Oct. 11, 1875J.D. HuntingtonImprovement in tools for turning emery-wheelsgrinder dressers
CA-6,521Sep. 07, 1876J.D. HuntingtonEmery-wheel dressergrinder dressers
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