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| Patents for Hugo M. Zschau | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 2,154,651 | Apr. 18, 1939 | O.P. Wodack, H.M. Zschau | Tool retainer for portable power driven tools | |
 | 2,201,420 | May 21, 1940 | H.M. Zschau | Disc sander for floors | |