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All Patents of Type: metalworking countersinks
Patents 1 - 14 of 14
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
332,308Dec. 15, 1885G.R. ValentineCountersinkmetalworking countersinks
341,938May 18, 1886C.L. PerkinsCleaning Toolmetalworking countersinks
370,484Sep. 27, 1887A. LathamCounterbore Reamer or Countersinkmetalworking counterbores
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
2,710,549Jun. 14, 1955S.A. CogsdillMicro-limit Countersink Driver metalworking countersinks
2,829,544Apr. 08, 1958W.C. BergstromCountersinking and counterboring toolmetalworking countersinks
2,905,030Sep. 22, 1959S.A. CogsdillMicro-Limit Countersink Drive With Override metalworking countersinks
3,099,174Jul. 30, 1963S.A. CogsdillCountersinking Tool metalworking countersinks
4,032,251Jun. 28, 1977T.A. RibichCountersinking and deburring toolmetalworking countersinks
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