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| All Patents in class 270/52.07 | |||||
| Number | Date | Patentee | Title | Type | |
| 2,829,887 | Apr. 08, 1958 | W.H. Franzemann | Machine for making manifold forms | ||
| 2,859,035 | Nov. 04, 1958 | W.H. Franzemann | Machine for making manifold forms | ||