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| All Patents in class 91/447 | |||||
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| Number | Date | Patentee | Title | Type | |
| 230,612 | Aug. 03, 1880 | C.M. Brown | Power-hammer | trip and helve hammers | |
| 1,937,244 | Nov. 28, 1933 | G.M. Pelton | Control means for dogging mechanism | sawmill dogs | |
| 2,027,706 | Jan. 14, 1936 | L.L. Schauer, J.H. McKewen | Counterbalance valve | drill presses | |
| 3,003,472 | Oct. 10, 1961 | D.C. Miller, R.M. Ferris | Quill Actuating and Clamping Mechanism | milling machines | |
| 3,077,132 | Feb. 12, 1963 | C.H. Whitmore | Feed control for band saws | metal cutting bandsaws | |