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| All Patents in class 277/563 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,456,014 | May 22, 1923 | F.E. Stevenson | Means for Operating Presses | hydraulic presses | |
| 1,962,380 | Jun. 12, 1934 | G.A. Biggs | Hydraulic Turbine | turbine water wheels | |