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| Patents for George H. Dunbar | |||||
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| Number | Date | Patentee | Title | Type | |
| 197,076 | Nov. 13, 1877 | R.W. Aitken | Balanced-Valve | steam engine valves | |
| 295,791 | Mar. 25, 1884 | J.T. Milne, D.F. Milne | Saw-mill | sawmill feed works | |