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| Patents for Charles E. Kemper | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,254,041 | Jan. 22, 1918 | H. Hoel | Rake Cleaner | rakes | |
| 1,271,778 | Jul. 09, 1918 | C.S. Sayre | Lawn Mower Sharpener | sharpeners | |