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| Patents for O. T. Simmons | |||||
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| Number | Date | Patentee | Title | Type | |
| 11,137 | Jun. 20, 1854 | C. Parker | Bench Vise | bench vises | |
| 1,153,171 | Sep. 07, 1915 | H. Neistadt | Clapboard-Marker | clapboard markers | |