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| Patents for John W. Challoner | |||||
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| Picture | Number | Date | Patentee | Title | |
| 831,215 | Sep. 18, 1906 | J.W. Challoner | Friction Clutch | ||
| 990,108 | Apr. 18, 1911 | H.T. Shipley, J.W. Challoner | Hay and Grain Loader | ||