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| Patents for Charles L. Mayhew | |||||
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| Number | Date | Patentee | Title | Type | |
| 591,862 | Oct. 19, 1897 | C.L. Mayhew | Gas Engine | gas and gasoline engines | |
| 652,909 | Jul. 03, 1900 | C.L. Mayhew | Gas Motor | gas and gasoline engines | |