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All Patents of Type: screw extractors
Patents 1 - 4 of 4
First set of recordsLast set of records
NumberDatePatenteeTitleType
1,105,535Jul. 28, 1914J.O. RobertsScrew Extractorscrew extractors
1,761,156Jun. 03, 1930F.R. RosanTurning Tool Applicable to Remove Refractory Screwsscrew extractors
1,875,484Sep. 06, 1932F. NigraScrew Extractorscrew extractors
2,507,167May 09, 1950D.R. LemmermanRotary Impact Type Turning Toolscrew extractors
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