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| Patents for Charles S. Hisey | |||||
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| Number | Date | Patentee | Title | Type | |
| 514,713 | Feb. 13, 1894 | C.S. Hisey | Gas Engine | internal combustion engines | |
| 712,537 | Nov. 04, 1902 | C.S. Hisey | Electric grinding device | handheld power tools | |
| 752,223 | Feb. 16, 1904 | C.S. Hisey | Variable-speed mechanism | handheld power drills | |