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| Patents for Olof Lindblad | |||||
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| Number | Date | Patentee | Title | Type | |
| 189,865 | Apr. 24, 1877 | O. Lindblad | Improvement in cutter-heads | cutterheads | |
| 200,316 | Feb. 12, 1878 | O. Lindblad | Improvement in cutter-heads | cutterheads | |