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| Patents for Edward W. Curtis | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,820,377 | Aug. 25, 1931 | E.W. Curtis | Sanding machine | belt sanders | |
| 1,974,806 | Sep. 25, 1934 | E.W. Curtis, A.V. Breed | Surfacing machine | sanding machines | |