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| All Patents in class 277/525 | |||||
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| Number | Date | Patentee | Title | Type | |
| 359,869 | Mar. 22, 1887 | R. Ruddy, L. Kaczander | Stuffing Box for Steam Engines | steam engine stuffing boxes | |
| 407,533 | Jul. 23, 1889 | F.G. Kellogg | Piston Rod Packing | piston ring and packing | |