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All Patents in class 408/183
Patents 1 - 4 of 4
First set of recordsLast set of records
NumberDatePatenteeTitleType
13,998Dec. 25, 1855J.P. RollinsExtension-Bitadjustable drill bits
442,827Dec. 16, 1890C.P. RussellScrew-cutting dietaps and dies
3,724,965Apr. 03, 1973G.C. GreenDouble Bladed Cutting Tooldrilling and boring tool holders
3,767,317Oct. 23, 1973R.M. OrtliebDouble Bladed Cutting Tooldrilling and boring tool holders
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