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Patents for J. E. Hoppen
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
211,096Jan. 07, 1879J.E. HoppenImprovement in grindstone-framesgrindstone frames
295,553Mar. 25, 1884J.E. HoppenHanger for shaftingindustrial machine shaft hangers
553,676Jan. 28, 1896J.E. HoppenShaft-hanger and lubricator thereforindustrial machine shaft hangers
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