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| Patents for B. M. Hartman | |||||
| Number | Date | Patentee | Title | Type | |
| 1,162,141 | Nov. 30, 1915 | G.B. De Arment | Tongs | ||
| 1,176,745 | Mar. 28, 1916 | G.L. Swabb, W.M. Fawcett | Locomotive | steam locomotives | |