All Patents in class 173/89


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All Patents in class 173/89
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
178,909	Jun. 20, 1876	I. Utter, O. Clarke	Rock-Drilling Machine	stone boring and drilling machines
367,783	Aug. 09, 1887	J.S. Brown	Well Drilling and Piping Machine	well drilling machines