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| Patents for Karl Hoepfner | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,082,521 | Dec. 30, 1913 | K. Hoepfner | Metal saw and trimmer | metal sawing machines | |
| 1,095,278 | May 05, 1914 | K. Hoepfner | Lathe | metal lathes | |