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| Patents for John F. Halstead | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,250,864 | Dec. 18, 1917 | J.F. Halstead | Chuck | drill press chucks | |
| 1,260,896 | Mar. 26, 1918 | J.F. Halstead | Tapping attachment for boring-machines | tapping heads and chucks | |