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| Patents for Charles L. Curtis | |||||
| Number | Date | Patentee | Title | Type | |
| 634,202 | Oct. 03, 1899 | G. Lispenard, C.L. Curtis | Machine for Making Tubes for Fire Cracker Bodies | tube making machines | |
| 950,256 | Feb. 22, 1910 | C.L. Curtis | Box-opener | nail extractors | |