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| Patents for S. Karpen & Bros. | |||||
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| Number | Date | Patentee | Title | Type | |
| 717,942 | Jan. 06, 1903 | F. Streich, C.L. Ruehs | Mechanical movement | carving machines | |
| 757,151 | Apr. 12, 1904 | F. Streich | Automatic carving-machine | carving machines | |