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| Patents for G. H. Washburn | |||||
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| Number | Date | Patentee | Title | Type | |
| 51,519 | Dec. 12, 1865 | J.B. Reed | Improved Welt-Trimmer | cobbler | |
| 51,931 | Jan. 09, 1866 | S. Darling | Inkstand | draftsman | |
| 54,731 | May 15, 1866 | L. Huntoon | Compound Steam Engine | steam engines | |
| 54,816 | May 15, 1866 | G.N. Goodspeed | Improvement in feeding mechanisms for sewing-machines | ||
| 54,820 | May 15, 1866 | A.G. Page | Improved Pipe-Tongs | pipe tongs | |