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| Patents for Hjorth Lathe & Tool Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 761,381 | May 31, 1904 | H.J. Hjorth | Surface Gage | surface gauges | |
| 861,283 | Jul. 30, 1907 | H.J. Hjorth | Wire Winding Tool | spring winding tools | |