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| Patents for Robert B. Ferguson | |||||
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| Number | Date | Patentee | Title | Type | |
| 756,949 | Apr. 12, 1904 | R.B. Ferguson | Spirit Level | spirit levels | |
| 1,246,000 | Nov. 06, 1917 | R.B. Ferguson | Wrench | screw adjust wrenches | |
| 1,301,674 | Apr. 22, 1919 | R.B. Ferguson | Wrench | screw adjust wrenches | |