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| Patents for Charles B. Sprague | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,344,096 | Jun. 22, 1920 | C.B. Sprague | Resawing-machine | band resaws | |
| 1,436,208 | Nov. 21, 1922 | C.B. Sprague | Sawmill hog | wood grinding machines | |