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| Patents for Simeon Duck | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-4,879 | Jun. 18, 1875 | S. Duck | Mortising machine | mortising machines | |
| 171,360 | Dec. 21, 1875 | S. Duck | Improvement in mortising-machines | mortising machines | |
| 197,111 | Nov. 13, 1877 | S. Duck | Improvement in mortising-machines | mortising machines | |