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| Patents for Charles A. Johnson | |||||
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| Number | Date | Patentee | Title | Type | |
| 464,568 | Dec. 08, 1891 | C.A. Johnson | Screw Cutting Die | taps and dies | |
| 630,712 | Aug. 08, 1899 | C.A. Johnson | Tool for Cutting Screw Threads | taps and dies | |
| 1,223,493 | Apr. 24, 1917 | C.A. Johnson | Tool Holder for Planers | metal planer tool holders | |
| 1,662,005 | Mar. 06, 1928 | C.A. Johnson | Ready Edge Blade | plane blades | |
| 1,875,736 | Sep. 06, 1932 | C.A. Johnson | Saw Set | saw sets | |