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| Patents for John S. Simpson | |||||
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| Number | Date | Patentee | Title | Type | |
| 19,480 | Mar. 02, 1858 | T. Blanchard | Method of bending shovel-handles | wood bending machines | |
| 20,137 | May 04, 1858 | T. Blanchard | Machine for bending wood | wood bending machines | |