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| Patents for Charles H. Graham | |||||
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| Number | Date | Patentee | Title | Type | |
| 394,170 | Dec. 11, 1888 | C.H. Graham | Blank Feeder and Gripping Die for Bolt Turning Machines | nut or bolt making machines | |
| 4,572,038 | Feb. 25, 1986 | C.H. Graham | Multi-purpose tool | screwdriver bits and holders | |
| D288,168 | Feb. 10, 1987 | C.H. Graham | Multiple-Tip Tool | screwdriver bits and holders | |