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| Patents for John Challoner | |||||
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| Picture | Number | Date | Patentee | Title | |
| 296,525 | Apr. 08, 1884 | J.W. Challoner, J. Challoner | Shingle-sawing machine | ||
 | 352,988 | Nov. 23, 1886 | J. Challoner, A. Bridgman | Drum sander | |
 | 411,580 | Sep. 24, 1889 | J. Challoner | Shingle-sawing machine | |