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| All Patents in class 418/69 | |||||
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| Number | Date | Patentee | Title | Type | |
| 878,543 | Feb. 11, 1908 | W. Krygowski | Steam Engine | steam engines | |
| 3,075,503 | Jan. 29, 1963 | W.A. Kimsey | Hydraulic screw feed mechanism | boring and turning machines | |