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| Patents for William Kerr Jr. | |||||
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| Picture | Number | Date | Patentee | Title | |
| 60,742 | Jan. 01, 1867 | W. Kerr, Jr. | Turning Irregular Forms | ||
 | 115,324 | May 30, 1871 | W. Kerr, Jr. | Improvement in Chucks for Watchmakers' Lathes | |