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| Patents for William J. Campbell | |||||
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| Number | Date | Patentee | Title | Type | |
| 743,058 | Nov. 03, 1903 | G.W. Bufford | Chain Wrench | chain and strap wrenches | |
| 1,217,895 | Mar. 06, 1917 | G. Amborn | Boring Tool Holder | lathe tool holders and tool posts | |