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| All Patents in class 476/51 | |||||
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| Number | Date | Patentee | Title | Type | |
| 33,283 | Sep. 10, 1861 | C. Sellers | Improvement in mode of transmitting motion | metalworking machine gearing | |
| 142,504 | Sep. 02, 1873 | L.H. Olmsted | Improvement in the modes of regulating speed in machinery | sewing machines | |
| 159,589 | Feb. 09, 1875 | C. Lindner | Improvement in saw-mills | circular sawmills | |
| 585,384 | Jun. 29, 1897 | J.W. Hawkins | Drill-press | drill presses | |