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| Patents for H. K. Smith | |||||
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| Number | Date | Patentee | Title | Type | |
| 74,621 | Feb. 18, 1868 | H.K. Smith | Lathe Rest | metal lathes | |
| 80,024 | Jul. 14, 1868 | H.K. Smith | Friction Clutch Pulley | industrial machine clutches | |