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All Patents of Type: thread rolling machines
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
1,406,004Feb. 07, 1922P.R. HahnemannMetal Working Machinethread rolling machines
2,967,444Jan. 10, 1961R.S. Litterst, E.E. HallbergThread Rolling Machinesthread rolling machines
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