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| Patents for Edward H. Curtis | |||||
| Number | Date | Patentee | Title | Type | |
| 1,257,548 | Feb. 26, 1918 | W.S. Thomson | Grinding and Polishing Machine | polishing and buffing machinery | |
| 1,257,549 | Feb. 26, 1918 | W.S. Thomson | Bearing Guide for Grinding Machines | ||