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| Patents for Charles L. Dunham | |||||
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| Number | Date | Patentee | Title | Type | |
| 332,191 | Dec. 08, 1885 | C.L. Dunham | Pipe Wrench | chain and strap wrenches | |
| 404,781 | Jun. 04, 1889 | C.L. Dunham | Pipe Wrench | chain and strap wrenches | |
| 404,789 | Jun. 04, 1889 | C.L. Dunham | Pipe Wrench | chain and strap wrenches | |
| 542,012 | Jul. 02, 1895 | C.L. Dunham | Pipe Wrench | pipe wrenches | |
| 563,848 | Jul. 14, 1896 | C.L. Dunham | Sucker Rod Wrench | wrenches | |
| 632,555 | Sep. 05, 1899 | C.L. Dunham | Wrench For Well-Drilling Tools | ||