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| Patents for Frank W. Hack | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,181,128 | Nov. 28, 1939 | F.W. Hack | Universal Machine Tool | metal lathes | |
| 2,318,938 | May 11, 1943 | F.W. Hack | Universal Machine Tool | metal lathes | |
| 2,344,039 | Mar. 14, 1944 | F.W. Hack | Multiversal Machine Tool and Boring Head Therefor | vertical boring mills | |