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| Patents for John Gardner | |||||
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| Number | Date | Patentee | Title | Type | |
| 645 | Mar. 17, 1838 | L. Wilder | Back for forges and furnaces | forge tuyeres | |
| 20,705 | Jun. 29, 1858 | J. Gardner, W. Gardner, G. Gardner | Lathe for turning oval frames | wood lathes | |
| 38,002 | Mar. 24, 1863 | T.D. Burrall | Corn Sheller | corn shellers | |
| 63,715 | Apr. 09, 1867 | J. Gardner | Improvement in saw-sets and gummers | saw sets | |