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| All Patents in class 277/526 | |||||
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| Number | Date | Patentee | Title | Type | |
| 121,985 | Dec. 19, 1871 | H. Bolthoff | Improvement in stamp-guides | ore processing apparatus | |
| 473,554 | Apr. 26, 1892 | E.P. Holly | Valve-Packing Device | plumber | |
| 846,746 | Mar. 12, 1907 | C.V. Kerr | Combined Bushing for Shafts of Steam Engines | steam turbines | |