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| Patents for D. B. Treadwell | |||||
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| Number | Date | Patentee | Title | Type | |
| 276,639 | May 01, 1883 | W.S. Doig, T.L. Smith | Feeder for nailing-machines | nailing machines | |
| 342,268 | May 18, 1886 | W.S. Doig, T.L. Smith | Box-nailing machine | nailing machines | |