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| Patents for Frank W. Schillberg | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,341,660 | Feb. 15, 1944 | F.W. Schillberg | Tool and Holder Therefor | lathe tool holders and tool posts | |
| 2,341,661 | Feb. 15, 1944 | F.W. Schillberg | Tool and Holder Therefor | lathe tool holders and tool posts | |