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| Patents for John F. Doolittle | |||||
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| Number | Date | Patentee | Title | Type | |
| 217,570 | Jul. 15, 1879 | J.F. Doolittle, J. Aitchison | Boiler Flue Cleaner | flue cleaners | |
| 541,785 | Jun. 25, 1895 | J.F. Doolittle | Steam Hammer | steam hammers | |