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| Patents for George J. Spahn | |||||
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| Number | Date | Patentee | Title | Type | |
| 647,311 | Apr. 10, 1900 | G.J. Spahn, W.T. Maxwell | Boring implement | hand drills | |
| 650,795 | May 29, 1900 | W.T. Maxwell, G.J. Spahn | Boring implement | ||