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| Patents for William J. Struewing | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,579,847 | Apr. 06, 1926 | W.J. Struewing | Shaper | metal shapers | |
| 2,024,535 | Dec. 17, 1935 | W.J. Struewing, O.H. Noble | Metal Working Machinery | metal shapers | |