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| All Patents in class 417/491 | |||||
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| Number | Date | Patentee | Title | Type | |
| 602,802 | Apr. 19, 1898 | A. Giesler | Ammoniacal Gas Compressor | compressors | |
| 1,109,775 | Sep. 08, 1914 | E. McCoy | Lubricator | steam engine lubricators | |
| 2,676,544 | Apr. 27, 1954 | G.A. Schauer, Jr. | Fuel Injection Pump for Dual Fuel Engines | fuel pumps | |