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| Patents for William Symington | |||||
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| Number | Date | Patentee | Title | Type | |
| GB-178,701,610 | Jun. 05, 1787 | W. Symington | Steam Engine | steam engines | |
| GB-180,102,544 | Oct. 14, 1801 | W. Symington | Horizontal steam engine with directly connected crank | steam engines | |