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| Patents for Joel Farnham | |||||
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| Number | Date | Patentee | Title | Type | |
| 954X | Nov. 23, 1808 | J. Farnham | Improvement in McComb's horizontal reacting water wheel | water wheels | |
| 979X | Jan. 07, 1809 | J. Farnham | Machine for making window sashes | window making machines | |
| 4,161X | Jun. 28, 1825 | J. Farnham | Machine for grating or grinding apples | apple graters | |