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