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| All Patents in class 418/210 | |||||
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| Number | Date | Patentee | Title | Type | |
| 855,028 | May 28, 1907 | J.C. Walker | Rotary Engine | rotary steam engines | |
| 878,543 | Feb. 11, 1908 | W. Krygowski | Steam Engine | steam engines | |
| 2,056,908 | Oct. 06, 1936 | L.L. Schauer | Multiple hydraulic rotor drive for drill spindles | drill presses | |
| 2,056,909 | Oct. 06, 1936 | L.L. Schauer | Hydraulic motor unit | drill presses | |