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| Patents for John K. Simpson | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,848X | Aug. 10, 1827 | J.K. Simpson | Mode of tightening bed sacking | ||
| 131,549 | Sep. 24, 1872 | A. Lachappelle | Improvement in circular-saw tables | tablesaws | |