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| All Patents of Type: coal lifters | |||||
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| Number | Date | Patentee | Title | Type | |
| 31,575 | Feb. 26, 1861 | A.H. Knapp | Coal Sifter and Shovel | coal lifters | |
| 567,087 | Sep. 01, 1896 | J.R. Thomas, O.P. Fitzgerald, Jr. | Coal Lifting Implement | coal lifters | |