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| All Patents in class 29/888.073 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 185,159 | Dec. 12, 1876 | W. Bartlett, L. Bartlett | Expanding Mandrels for Turning Piston Rings | ||
| 1,697,896 | Jan. 08, 1929 | A.T. Yates | Process for bending bars and the like | ||