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| All Patents in class 246/471 | |||||
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| Number | Date | Patentee | Title | Type | |
| 58,196 | Sep. 25, 1866 | E.G. Allen | Improved railway-frog | track and switches | |
| RE2,405 | Dec. 04, 1866 | E.G. Allen | Improvement in railroad frogs | track and switches | |