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| Patents for John L. Seyfang | |||||
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| Number | Date | Patentee | Title | Type | |
| 536,897 | Apr. 02, 1895 | J.L. Seyfang | Reversing Gear for Steam Engines | steam engine valve gear | |
| 536,898 | Apr. 02, 1895 | J.L. Seyfang | Reversing Gear for Steam Engines | steam engine valve gear | |