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| Patents for C. H. Duell | |||||
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| Number | Title | Classification(s) | |||
| 265,180 | Lubricator | 184/50.1 | |||
| CA-16,545 | Perfectionnements aux Graisseurs | ||||
| 288,376 | Saw-clamp | 76/79.5 | |||
| 294,097 | Mortise-cleaner | 144/69 | |||
| 319,942 | Spoke driving and tenoning machine | 144/206, 157/3 | |||
| 365,019 | Pipe Wrench | 81/174, 81/179, 81/186 | |||
| 396,223 | Spring-vehicle | 280/124.117 | |||
| 409,455 | Miter machine | 269/291, 269/58 | |||
| 410,847 | Spring-vehicle | 267/260 | |||