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Patents for Richard J. Holmgreen
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
422,053Feb. 25, 1890R.J. HolmgreenMachine for turning broom-handleswood lathes
1,502,633Jul. 22, 1924J.H. HolmgreenStop Mechanism for Bending Machinesmetal bending machines
1,679,825Aug. 07, 1928R.J. Holmgreen, J.H. HolmgreenRotary Well Drilling Machinewell drilling machines
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