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| Patents for S. S. Spencer | |||||
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| Number | Date | Patentee | Title | Type | |
| 208,030 | Sep. 17, 1878 | T.G. Morse | Improvement in boring-machines | vertical boring mills | |
| 238,815 | Mar. 15, 1881 | E.H. Stearns | Lumber-trimming machine | circular ripsaws | |