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| Patents for Charles L. Barnes | |||||
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| Number | Date | Patentee | Title | Type | |
| 9,398 | Nov. 16, 1852 | C.L. Barnes | Expanding bit | adjustable drill bits | |
| 21,179 | Aug. 17, 1858 | C.L. Barnes | Bit with Detachable Cutter | drill bits | |