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| Patents for R. W. Sommers | |||||
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| Number | Date | Patentee | Title | Type | |
| 423,090 | Mar. 11, 1890 | F.F. Smith | Combined Square, Plumb, and Level | squares | |
| 682,294 | Sep. 10, 1901 | H. Terlin | Compasses, Cailipers, etc. | compasses | |