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All Patents of Type: grindstone frames
Patents 1 - 5 of 5
First set of recordsLast set of records
NumberDatePatenteeTitleType
134,363Dec. 31, 1872G.L. CummingsImprovement in grindstone-framesgrindstone frames
211,096Jan. 07, 1879J.E. HoppenImprovement in grindstone-framesgrindstone frames
367,331Jul. 26, 1887W.F. BarnesGrindstone-framegrindstone frames
569,806Oct. 20, 1896H. WhiteGrindstone-framegrindstone frames
1,210,145Dec. 26, 1916L.V. CalhounFolding grindstone-framegrindstone frames
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