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All Patents in class 81/57.34
Patents 1 - 4 of 4
First set of recordsLast set of records
NumberDatePatenteeTitleType
421,020Feb. 11, 1890D.J. ThayerWrench For Oil Well Toolsratchet wrenches
422,879Mar. 04, 1890W. ForgieImprovements In Automatic Wrench for Coupling and Uncoupling the Tools or Drill-Rods of Well-Boring Apparatus wrenches
586,527Jul. 13, 1897L.E. BrackneyMeans For Coupling Or UnCoupling Oil-Well Toolswrenches
1,629,895May 24, 1927M.J. TullyDouble Wrenchpipe wrenches
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