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| Patents for D. B. Bartholomew | |||||
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| Number | Date | Patentee | Title | Type | |
| 18,948 | Dec. 29, 1857 | D.B. Bartholomew | Gearing for feed-rollers in resawing-machines | sawmills | |
| 30,864 | Dec. 11, 1860 | D.B. Bartholomew | Arrangement of devices in sawing-machines | scrollsaws | |