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| Patents for John Hamm | |||||
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| Number | Date | Patentee | Title | Type | |
| 202,309 | Apr. 09, 1878 | J. Wagner | Improvement in saw-sharpening machines | saw sharpening machines | |
| 305,920 | Sep. 30, 1884 | J. Hamm | Marker for Weather-Boards, Flooring, and Jambs | clapboard markers | |