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| Patents for J. F. Halladay | |||||
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| Number | Date | Patentee | Title | Type | |
| 334,893 | Jan. 26, 1886 | E. Pement | Lathe-chuck | metal lathe chucks | |
| 335,619 | Feb. 09, 1886 | E. Pement | Lathe-chuck | metal lathe chucks | |
| GB-188,601,882 | Mar. 30, 1886 | E. Pement | Improvement in lathe chucks | metal lathe chucks | |