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| Patents for Thorvald F. Hammer | |||||
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| Number | Date | Patentee | Title | Type | |
| 305,305 | Sep. 16, 1884 | J.F. Nettleton, T.F. Hammer | Metallic Can | oil cans | |
| 321,023 | Jun. 30, 1885 | T.F. Hammer | Screw Tapping Machine | metal threading machines | |