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| Patents for Elon A. Marsh | |||||
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| Picture | Number | Date | Patentee | Title | |
| 194,698 | Aug. 28, 1877 | E.A. Marsh | Improvement in music-supports | ||
 | 209,064 | Oct. 15, 1878 | E.A. Marsh | Improvement in lathes for turning regular forms | |
| 236,052 | Dec. 28, 1880 | E.A. Marsh | Steam-engine valve-gear | ||
| 308,567 | Nov. 25, 1884 | E.A. Marsh | Reversing-gear for steam-engines | ||