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| Patents for James Roberts | |||||
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| Number | Date | Patentee | Title | Type | |
| 331,449 | Dec. 01, 1885 | J. Roberts | Variable feed-motion for planing-machines | woodworking machine stockfeeding mechanisms | |
| 429,395 | Jun. 03, 1890 | J.R. Thomas | Pressure Bar for Planing Machines | wood planers | |
| D21,850 | Sep. 06, 1892 | J. Roberts | Design for a cutter-head hood for planers | wood planers | |
| 495,912 | Apr. 18, 1893 | J. Roberts | Cutter-head hood for planers or matchers | wood planers | |
| 553,828 | Feb. 04, 1896 | C.W. Blood | Grinding-machine | ||