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All Patents in class 81/457
Patents 1 - 6 of 6
First set of recordsLast set of records
NumberDatePatenteeTitleType
491,687Feb. 14, 1893J.R. QuimbyAttachment for Screwdriverscrewdriver mechanisms
774,112Nov. 01, 1904W. RundquistScrew Gripping Screwdriverscrewdriver blades
1,641,307Sep. 06, 1927R.J. VelepecScrew Driverscrewdrivers
1,645,753Oct. 18, 1927E. HansonScrew holding screwdriverscrewdriver blades
2,796,100Jun. 18, 1957H.E. DierkerScrew Holding Screwdriverscrewdriver blades
2,884,971May 05, 1959H.E. DierkerScrew holding screwdriverscrewdriver blades
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