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| All Patents in class 104/120 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,961X | Mar. 09, 1832 | J. Richards | Railways and cars used thereon | ||
| 167 | Apr. 17, 1837 | U. Emmons | Improvement in the mode of constructing single-rail railroads | railroad machines | |