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| Patents for David Johnson | |||||
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| Number | Date | Patentee | Title | Type | |
| NX-182,309,191 | Sep. 19, 1823 | D. Johnson | Machine for boring holes in chairs | drilling and boring | |
| NX-3,856 | Apr. 24, 1824 | D. Johnson | Machine for boring holes in chairs | drilling and boring | |