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| All Patents in class 144/4.4 | |||||
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| Number | Date | Patentee | Title | Type | |
| 582,915 | May 18, 1897 | A.B. Harris | Railroad-tie boring and trimming machine | drilling and boring | |
| 778,258 | Dec. 27, 1904 | W.E. Martin | Machine for rail ties | railroad machines | |