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| Patents for Charles D. Butler | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 113,954 | Apr. 18, 1871 | L.H. Watson | Barrel Filler | |
 | 671,177 | Apr. 02, 1901 | J.V. Beekman | Derrick-engine | |
| 718,916 | Jan. 20, 1903 | H.N. Covell | Combined brake and friction operating mechanism | ||