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| Patents for F. Allen | |||||
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| Number | Date | Patentee | Title | Type | |
| 170,814 | Dec. 07, 1875 | W.W. Carey | Improvement in band sawing-machines | bandsaws | |
| 203,261 | May 07, 1878 | L. Glynn | Pipe-Wrench | pipe wrenches | |
| 227,892 | May 25, 1880 | L. Glynn | Improvements in Pipe and Nut Wrenches | screw adjust wrenches | |
| 233,893 | Nov. 02, 1880 | J.C. Stevens | Pipe and Nut Wrench | pipe wrenches | |
| 255,409 | Mar. 28, 1882 | A.H. Brainard | Gear-cutting machine | gear making machines | |