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| Patents for Simeon Heywood | |||||
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| Number | Date | Patentee | Title | Type | |
| 39,046 | Jun. 30, 1863 | S. Heywood | Improved shingle machine | shingle machines | |
| 53,823 | Apr. 10, 1866 | S. Heywood | Improvement in shingle machines | shingle machines | |