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| Patents for Alfred G. Isaacson | |||||
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| Number | Date | Patentee | Title | Type | |
| 124,659 | Mar. 19, 1872 | W.T. Farre, W.H. Barwick | Improvement in devices for cutting off pipes | pipe cutters | |
| 125,433 | Apr. 09, 1872 | W.T. Farre, W.H. Barwick | Improvement in Pipe Vises | ||