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| Patents for George W. Hoglen | |||||
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| Number | Date | Patentee | Title | Type | |
| 166,704 | Aug. 17, 1875 | W. Krutzsch | Improvement in milling-machines | milling machines | |
| 166,705 | Aug. 17, 1875 | W. Krutzsch | Improvement in gear-cutting attachments | milling machine accessories | |
| 166,716 | Aug. 17, 1875 | R.C. Nugent | Screw Cutting Dies | taps and dies | |
| 166,787 | Aug. 17, 1875 | W. Krutzsch | Improvement in tool-holding attachments for metal-lathes | turret lathes | |