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| Patents for Pliny M. Harwood | |||||
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| Number | Date | Patentee | Title | Type | |
| 316,713 | Apr. 28, 1885 | L.E. Whiton | Tool for holding scroll-plates of scroll-chucks | metal lathe chucks | |
| 369,758 | Sep. 13, 1887 | L.E. Whiton | Scroll chuck for metal lathes | metal lathe chucks | |