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| All Patents in class 91/476 | |||||
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| Number | Date | Patentee | Title | Type | |
| 364,225 | Jun. 07, 1887 | H.E. Doggett | Steam Motor | steam engines | |
| 2,420,984 | May 20, 1947 | R.H. Shepard | Hydraulic Pump | hydraulic pumps | |
| 2,474,661 | Jun. 28, 1949 | B.E. Folke, R.H. Shepard | Lubricating Device | gas turbine lubricators | |
| 2,555,479 | Jun. 05, 1951 | C.F. Erikson | Variable Discharge Pump and Control Therefor | reciprocating pumps | |