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| Patents for William A. Drown | |||||
| Number | Date | Patentee | Title | Type | |
| 357,028 | Feb. 01, 1887 | H. Plumb | Rod-sanding machine | sanding machines | |
| 357,029 | Feb. 01, 1887 | H. Plumb | Rod-sanding machine | sanding machines | |