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| All Patents in class 184/49 | |||||
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| Number | Date | Patentee | Title | Type | |
| 361,435 | Apr. 19, 1887 | E. McCoy | Lubricator Attachment | steam engine lubricators | |
| 854,797 | May 28, 1907 | W.E. Bryant | Automatic Oil Check for Lubricator Drain Passages | lubricators | |
| 855,932 | Jun. 04, 1907 | W.E. Bryant | Float Valve for Drain Cock Plugs | lubricators | |
| 890,757 | Jun. 16, 1908 | W.E. Bryant | Automatic Oil Check for Lubricator Drain Passages | lubricators | |