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| All Patents in class 173/154 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,994,040 | Mar. 12, 1935 | L.L. Schauer | Combined Arm and Sump | metalworking machine mechanisms | |
| 2,108,780 | Feb. 15, 1938 | L.L. Schauer, J.H. McKewen | Submerged motor | drill presses | |