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| Patents for J. Snowden Hall | |||||
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| Number | Date | Patentee | Title | Type | |
| 241,481 | May 17, 1881 | L.R. Faught | Boring-bar | drill bits | |
| 241,482 | May 17, 1881 | L.R. Faught | Boring-bar | drill bits | |
| 241,483 | May 17, 1881 | L.R. Faught | Machine for boring metal | drill presses | |