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| Patents for William A. Hughes | |||||
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| Number | Date | Patentee | Title | Type | |
| 30,485 | Oct. 23, 1860 | J.F. Letellier | Steam Valve | steam engine valves | |
| 397,048 | Jan. 29, 1889 | E. Bretney | Dust-collector | waste collection mechanisms | |