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| Patents for Charles E. Hadley | |||||
| Number | Date | Patentee | Title | Type | |
| 330,581 | Nov. 17, 1885 | C.E. Hadley | Compound Milling Machine | milling machines | |
| 342,866 | Jun. 01, 1886 | C.E. Hadley, G.K. Garvin | Tapping-machine | tapping machines | |