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| Patents for John T. Obenchain | |||||
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| Picture | Number | Date | Patentee | Title | |
| 282,760 | Aug. 07, 1883 | J.T. Obenchain | Machine for Dressing Millstones | ||
| 282,761 | Aug. 07, 1883 | J.T. Obenchain | Machine for Facing Millstones | ||