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| Patents for Charles G. Hildreth | |||||
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| Number | Date | Patentee | Title | Type | |
| 50,584 | Oct. 24, 1865 | B. Holly | Fire Tongs | fireplace tools | |
| 53,617 | Apr. 03, 1866 | B. Holly | Steam Boiler Water Tube | stationary boilers | |
| 54,905 | May 22, 1866 | B. Holly | Compressing Air | air compressors | |