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| All Patents in class 271/37 | |||||
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| Number | Date | Patentee | Title | Type | |
| 635,792 | Oct. 31, 1899 | J.W. Mansfield | Sheet-feeding machine | printer | |
| 1,597,408 | Aug. 24, 1926 | J.T. Hale | Sheet-separating mechanism | printer | |