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| Patents for John E. Roberts | |||||
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| Number | Date | Patentee | Title | Type | |
| 199,955 | Feb. 05, 1878 | A. Box | Improvement in screw hoisting-pulley apparatus | hoists, winches, come-alongs | |
| 632,678 | Sep. 05, 1899 | H. Dock | Tool for cutting screw-threads | screwcutting lathes | |
| 661,554 | Nov. 13, 1900 | J.E. Roberts | Rotary Cutter Head | drill bits | |