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| Patents for Charles W. Johnson | |||||
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| Number | Date | Patentee | Title | Type | |
| 49,034 | Jul. 25, 1865 | C.W. Johnson | Improvement in rock-drills | ||
| 924,999 | Jun. 15, 1909 | C. Kummer | Screw holding screwdriver | screwdriver blades | |
| 2,808,651 | Oct. 08, 1957 | C.W. Johnson | Caliper for a Lens or the Like | calipers | |