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| Patents for Charles W. Sponsel | |||||
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| Number | Date | Patentee | Title | Type | |
| 446,898 | Feb. 24, 1891 | C.W. Sponsel | Rifling Machine | rifling machines | |
| 870,203 | Nov. 05, 1907 | C.W. Sponsel | Speed-Indicator | wheel-based measurers | |
| 1,902,117 | Mar. 21, 1933 | R.S. Crosby, C.W. Sponsel | Screw making machine | screw machines | |