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| Patents for Charles G. Allen | |||||
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| Number | Date | Patentee | Title | Type | |
| 154,165 | Aug. 18, 1874 | C.G. Allen | Improvement in core-boxes for metallic hubs | ||
| 187,876 | Feb. 27, 1877 | C.M. Lufkin, C.G. Allen | Improvement in horse hay-rakes | hay or straw rakes | |