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| Patents for F. G. Day | |||||
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| Number | Date | Patentee | Title | Type | |
| 27,046 | Feb. 07, 1860 | W.B. Gillett | Improvement in Methods of sharpening Files, etc. | files | |
| 33,220 | Sep. 03, 1861 | H. Van DeWater | Improved water-wheel | turbine water wheels | |
| 62,915 | Mar. 12, 1867 | W.A. Kirby, D. Wright | Coal Scuttle | coal scuttles | |
| 152,277 | Jun. 23, 1874 | D.C. Clough | Improvement in journal-bearings | industrial machine bearings | |