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| Patents for Charles E. Roberts | |||||
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| Number | Date | Patentee | Title | Type | |
| 242,046 | May 24, 1881 | C.E. Roberts | Emery Wheel Dresser | grinder dressers | |
| 355,718 | Jan. 11, 1887 | C.E. Roberts | Machine for Milling Nuts | nut or bolt making machines | |
| 602,106 | Apr. 12, 1898 | C.E. Roberts | Tool for dressing emery-wheels | grinder dressers | |