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| All Patents in class 408/48 | |||||
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| Number | Date | Patentee | Title | Type | |
| 274,020 | Mar. 13, 1883 | J.M. Nash | Wood-boring machine | chair maker | |
| 526,198 | Sep. 18, 1894 | G.W. Pringle, W. Brodie | Boring-machine | drilling and boring | |
| 614,378 | Nov. 15, 1898 | W.R. Fox | Automatic rim-drilling machine | drilling and boring | |
| 1,210,450 | Jan. 02, 1917 | W.R. Fox | Attachment for multiple drills | multiple spindle drill presses | |
| 1,452,172 | Apr. 17, 1923 | R.F. Scott | Drill-rpindle-adjusting mechanism | multiple spindle drill presses | |