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All Patents in class 29/DIG.91
Patents 1 - 4 of 4
First set of recordsLast set of records
NumberDatePatenteeTitleType
157,700Dec. 15, 1874C. SellersMachines for Threading Bolts
162,194Apr. 20, 1875E. SchlenkerImprovement in bolt-threading machinesmetal threading machines
179,318Jun. 27, 1876O.L. JenksImprovement in circular-saw millscircular sawmills
1,076,947Oct. 28, 1913E.P. Bullard, Jr.Cutting Lubricant Attachment for Machine Toolsmetalworking machine mechanisms
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