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| Patents for John U. Hubbard | |||||
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| Number | Date | Patentee | Title | Type | |
| 314,845 | Mar. 31, 1885 | J.U. Hubbard | Die for forming ax-poll clips | making axes | |
| 339,059 | Mar. 30, 1886 | J.U. Hubbard | Device for making claw-hatchets | making axes | |
| 427,689 | May 13, 1890 | J.U. Hubbard | Machine for forming ax-polls | making axes | |