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| Patents for Charles Allen | |||||
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| Number | Date | Patentee | Title | Type | |
| 197,446 | Nov. 27, 1877 | C. Allen | Rope-molding machine | rope and spiral cutting machines | |
| 343,217 | Jun. 08, 1886 | H.A. Axtell | Mortising and boring machine | mortising machines | |
| 376,200 | Jan. 10, 1888 | H.D. Lanfair | Miter-box | miter boxes | |
| 404,312 | May 28, 1889 | E.B. Shepardson | Combined Square, Center Square & Bevel | try squares | |
| 466,929 | Jan. 12, 1892 | H.D. Lanfair | Hack Saw Machine | metal sawing machines | |