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| Patents for Charles G. Johnson | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,433,528 | Oct. 31, 1922 | C.G. Johnson, E.J. Bryant | Ring Thread Gauge | thread gages | |
| 1,660,335 | Feb. 28, 1928 | C.G. Johnson | Snap Thread Gage | special purpose gauges | |
| 1,851,283 | Mar. 29, 1932 | C.G. Johnson | Gauge | special purpose gauges | |