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| All Patents in class 277/518 | |||||
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| Number | Date | Patentee | Title | Type | |
| 860,035 | Jul. 16, 1907 | C.V. Kerr | Shaft for Steam Turbines | steam turbines | |
| 1,765,629 | Jun. 24, 1930 | F.D. Stanley | Stuffing Box | pump stuffing boxes and seals | |