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Patents for John Ackerman
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
274,099Mar. 20, 1883J. Ackerman, A.O. Mitchell, F.M. UnderwoodSaw-mill dogsawmill dogs
303,967Aug. 26, 1884J. AckermanSaw-mill dogsawmill dogs
365,661Jun. 28, 1887J. Ackerman, J.C. BlairSaw-mill dogsawmill dogs
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