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| Patents for Spencer Lewis | |||||
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| Number | Date | Patentee | Title | Type | |
| 5,812 | Sep. 26, 1848 | S. Lewis | Improvement in Cutting Screws on Rails of Bedsteads | wood threading machines | |
| 7,264 | Apr. 09, 1850 | S. Lewis | Machine for cutting screws on the rails of bedsteads | wood threading machines | |
| 7,381 | May 21, 1850 | S. Lewis | Improvement in machines for sawing wood | drag saws | |
| 8,416 | Oct. 07, 1851 | S. Lewis | Machine for Cutting Screws on Rails of Bedsteads | wood threading machines | |