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All Patents in class 91/407
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
2,397,814Apr. 02, 1946H.J. Caldwell, S.F. Manning, E.Y. SeborgHoning machinehoning machines
2,454,235Nov. 16, 1948E.J. TomekDrilling machinemultiple spindle drill presses
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