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| Patents for William C. Robby | |||||
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| Number | Date | Patentee | Title | Type | |
| 720,486 | Feb. 10, 1903 | W.N. Rumely, W.C. Robby | Pneumatic Straw Stacker | hay or straw stackers | |
| 1,126,288 | Jan. 26, 1915 | W.C. Robby, W.N. Rumely | Interchangeable Grain Thresher and Huller | threshers and thrashers | |
| 1,177,812 | Apr. 04, 1916 | W.C. Robby, W.N. Rumely | Interchangeable Grain Thresher and Huller | threshers and thrashers | |