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| All Patents in class 417/92 | |||||
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| Number | Date | Patentee | Title | Type | |
| 54,905 | May 22, 1866 | B. Holly | Compressing Air | air compressors | |
| 863,115 | Aug. 13, 1907 | R.D. Tomlinson | Condenser | steam condensers | |