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| Patents for B. G. Underwood | |||||
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| Number | Date | Patentee | Title | Type | |
| 270,769 | Jan. 16, 1883 | J. England | Cavity-plane | scraper planes | |
| 284,555 | Sep. 04, 1883 | G.M. Hopkins | Gas Engine | gas and gasoline engines | |
| 284,556 | Sep. 04, 1883 | G.M. Hopkins | Gas Engine | gas and gasoline engines | |
| 284,557 | Sep. 04, 1883 | G.M. Hopkins | Gas Engine | gas and gasoline engines | |
| 284,851 | Sep. 11, 1883 | I.N. Hopkins, G.M. Hopkins | Gas Engine | gas and gasoline engines | |