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| Patents for Charles Spring | |||||
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| Number | Date | Patentee | Title | Type | |
| 23,957 | May 10, 1859 | A. Spring, C. Spring | Lathe for Turning Irregular Forms | metal lathes | |
| 205,006 | Jun. 18, 1878 | J.T. Robinson, C. Spring | Coping saw | coping saws | |
| 213,257 | Mar. 11, 1879 | C. Spring | Draw Knife | draw knives | |