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| All Patents in class 400/248 | |||||
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| Number | Date | Patentee | Title | Type | |
| 843,830 | Feb. 12, 1907 | E.G. Latta | Ribbon mechanism for type-writing machines | ||
| 944,734 | Dec. 28, 1909 | O.C. Kavle | Ribbon mechanism for type-writing machines | ||