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Patents for Bickford Drill & Tool Co.
Patents 1 - 4 of 4
First set of recordsLast set of records
NumberDatePatenteeTitleType
489,317Jan. 03, 1893A. MillTapping attachment for drillstapping machines
543,395Jul. 23, 1895A. MillDrilling-machinedrill presses
792,842Jun. 20, 1905H.M. NorrisDrillmultiple spindle drill presses
883,118Mar. 24, 1908H.M. NorrisArm for Radial Drillsradial drill presses
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