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| All Patents in class 417/85 | |||||
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| Number | Date | Patentee | Title | Type | |
| 189,414 | Apr. 10, 1877 | C. Ahrens | Improvement in steam-pumps | steam pumps | |
| 863,115 | Aug. 13, 1907 | R.D. Tomlinson | Condenser | steam condensers | |