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Patents for Julius H. Holmgreen
Patents 1 - 4 of 4
First set of recordsLast set of records
1,372,816Mar. 29, 1921J.H. HolmgreenBending Machine and Method of Bendingmetal bending machines
1,465,733Aug. 21, 1923J.H. HolmgreenBending Machinemetal bending machines
1,679,825Aug. 07, 1928R.J. Holmgreen, J.H. HolmgreenRotary Well Drilling Machinewell drilling machines
1,819,417Aug. 18, 1931J.H. HolmgreenJoint Packingpacking for joints
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