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Patents for Byron Sprague | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 42,216 | Apr. 05, 1864 | W.T. Nicholson | Improvement in File Cutting Machines | |
![]() | 42,217 | Apr. 05, 1864 | W.T. Nicholson | Improvement in File Cutting Machines |