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| Patents for John J. Clark | |||||
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| Number | Date | Patentee | Title | Type | |
| 66,678 | Jul. 16, 1867 | T. Clark, J.J. Clark | Improvement in machine for tenoning blind-slats | tenoning machines | |
| 82,801 | Oct. 06, 1868 | T. Clark, J.J. Clark | Improvement in blind-slat-tenoning machine | tenoning machines | |
| 93,519 | Aug. 10, 1869 | T. Clark, J.J. Clark | Improvement in rabbeting-machine | rabbeting machines | |