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| Patents for Robert Ruddy | |||||
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| Number | Date | Patentee | Title | Type | |
| 337,500 | Mar. 09, 1886 | R. Ruddy, L. Kaczander | Lubricator | steam engine lubricators | |
| 359,869 | Mar. 22, 1887 | R. Ruddy, L. Kaczander | Stuffing Box for Steam Engines | steam engine stuffing boxes | |
| 445,642 | Feb. 03, 1891 | R. Ruddy, L. Kaczander | Injector | water injectors | |
| 532,563 | Jan. 15, 1895 | L. Kaczander | Steam Injector | water injectors | |
| 636,532 | Nov. 07, 1899 | J. Desmon, L. Kaczander, R. Ruddy | Lubricator | steam engine lubricators | |