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Elijah McCoy, Improvement in Lubricators for Steam-Engines, US patent 129,843 (page 1 out of 2), patented July 23, 1872
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| Date/Time | Dimensions | User | Comment | |
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| current | 01:16, 27 February 2006 | 2,320×3,408 (54 KB) | MarkSweep | (First page of US patent 129,843 {{patent}}) |
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