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