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| Patents for Charles O. Wilder | |||||
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| Number | Date | Patentee | Title | Type | |
| 369,489 | Sep. 06, 1887 | C.O. Wilder | Indicator Attachment for Chucks | tool setting apparatus | |
| 383,084 | May 15, 1888 | C.O. Wilder | Machine for forming eyes on rods | specialty machines | |