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| Patents for A. D. Allen | |||||
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| Number | Date | Patentee | Title | Type | |
| 358,731 | Mar. 01, 1887 | H. Clark | Countersink | countersinks | |
| 621,293 | Mar. 14, 1899 | G.F. Crass | Chain Pipe Wrench | chain and strap wrenches | |
| 631,664 | Aug. 22, 1899 | W.M. Potter | Saw Vise | saw vises | |