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| Patents for J. Johnston | |||||
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| Number | Date | Patentee | Title | Type | |
| 109,908 | Dec. 06, 1870 | F. Jackson | Lubricator | steam engine lubricators | |
| 476,257 | Jun. 07, 1892 | J.J. Finmand | Siding-Holder | clapboard markers | |