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Patents for J. M. Colgan
Patents 1 - 4 of 4
First set of recordsLast set of records
109,178Nov. 15, 1870J.C. ClimeImprovement in sawing-machineshuman powered machines
110,705Jan. 03, 1871T. WelhamImprovement in Sawssaw handles
116,134Jun. 20, 1871J. Yocom, Jr.Improvement in split castingsfoundryman
629,236Jul. 18, 1899J. CarrTool Holder for Metal Working Machines
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