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| Patents for James E. Ladd | |||||
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| Number | Date | Patentee | Title | Type | |
| 110,460 | Dec. 27, 1870 | J.E. Ladd, H.F. Henderson | Gage for Turning Clock Work | clockmaker | |
| 142,014 | Aug. 19, 1873 | H. Gray | Centering Devices for Lathes | metal lathe accessories and attachments | |