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All Patents in class 408/157
Patents 1 - 9 of 9
First set of recordsLast set of records
NumberDatePatenteeTitleType
10,872May 02, 1854A. WeeksExpansion-bitadjustable drill bits
115,291May 30, 1871L.R. FaughtImprovement in die-stocks for cutting screwstaps and dies
1,713,646May 21, 1929G.H. DeyoBoring Headboring heads
1,769,230Jul. 01, 1930H.H. ManningRotary cutterboring bars
2,223,041Nov. 26, 1940T. MaxwellBoring Headboring heads
2,605,655Aug. 05, 1952E.J. KaiserBoring Cutterboring heads
3,256,755Jun. 21, 1966W. KrausAdjustable Boring Headboring heads
4,162,867Jul. 31, 1979D.W. Barton, R.A. Rhinefrank, D.J. CalcaterraDual Cutter Boring Headboring heads
4,242,018Dec. 30, 1980H. SchürfeldBoring Tool
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