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| Patents for Leslie Brothers Mfg. Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 434,796 | Aug. 19, 1890 | E. Leslie | Throttle Valve | steam engine valves | |
| 450,487 | Apr. 14, 1891 | J.W. Haughawout | Rotary Snow Plow | railroad snow plows | |