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Patents for Robert B. Ferguson | |||||
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Picture | Number | Date | Patentee | Title | |
756,949 | Apr. 12, 1904 | R.B. Ferguson | Spirit Level | ||
![]() | 1,246,000 | Nov. 06, 1917 | R.B. Ferguson | Wrench | |
![]() | 1,301,674 | Apr. 22, 1919 | R.B. Ferguson | Wrench |