All Patents in class 81/57.34


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All Patents in class 81/57.34
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	421,020	Feb. 11, 1890	D.J. Thayer	Wrench For Oil Well Tools
	422,879	Mar. 04, 1890	W. Forgie	Improvements In Automatic Wrench for Coupling and Uncoupling the Tools or Drill-Rods of Well-Boring Apparatus
	586,527	Jul. 13, 1897	L.E. Brackney	Means For Coupling Or UnCoupling Oil-Well Tools
	1,629,895	May 24, 1927	M.J. Tully	Double Wrench