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All Patents of Type: metalworking countersinks
Patents 1 - 8 of 8
First set of recordsLast set of records
NumberDatePatenteeTitleType
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
2,226,226Dec. 24, 1940O.C. HedinRemovable pilot for counterbore or reamermetalworking countersinks
2,242,510May 20, 1941S.A. CogsdillAdjustable countersink structuremetalworking countersinks
2,308,055Jan. 12, 1943S.A. CogsdillAdjustable countersink structuremetalworking countersinks
2,829,544Apr. 08, 1958W.C. BergstromCountersinking and counterboring toolmetalworking countersinks
4,032,251Jun. 28, 1977T.A. RibichCountersinking and deburring toolmetalworking countersinks
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