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| Patents for Olof Lindblad | |||||
| Picture | Number | Date | Patentee | Title | |
![]() | 189,865 | Apr. 24, 1877 | O. Lindblad | Improvement in cutter-heads | |
![]() | 200,316 | Feb. 12, 1878 | O. Lindblad | Improvement in cutter-heads | |