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All Patents of Type: metalworking countersinks
Patents 1 - 5 of 5
First set of recordsLast set of records
74,870Feb. 25, 1868P.A. WhitneyDrill and Countersinkmetalworking countersinks
252,704Jan. 24, 1882W.H. SouthwickCombined Drill and Countersinkdrill bits
1,047,466Dec. 17, 1912F.A. WagnerCutter Securing Meansmetalworking countersinks
2,242,510May 20, 1941S.A. CogsdillAdjustable countersink structuremetalworking countersinks
2,308,055Jan. 12, 1943S.A. CogsdillAdjustable countersink structuremetalworking countersinks
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