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| Patents for John F. Allen | |||||
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| Number | Date | Patentee | Title | Type | |
| RE9,303 | Jul. 20, 1880 | J.F. Allen | Balanced valve | steam engine valves | |
| 306,375 | Oct. 14, 1884 | J.F. Allen | Portable drilling-machine | portable metal boring and drilling machines | |