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| Patents for J. T. Hanna | |||||
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| Number | Date | Patentee | Title | Type | |
| 164,665 | Jun. 22, 1875 | S. Tilton | Improved Instrument to Keep Calves from Sucking | animal weaners | |
| 176,383 | Apr. 18, 1876 | S. Tilton | Muzzles for Calves | animal weaners | |