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| Patents for Louis T. Koerner | |||||
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| Number | Date | Patentee | Title | Type | |
| 843,010 | Feb. 05, 1907 | J. Gramelspacher | Sandpapering-machine | belt sanders | |
| 860,367 | Jul. 16, 1907 | J. Gramelspacher | Sandpapering-machine | belt sanders | |