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| Patents for Antonin Placek | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,324,269 | Dec. 09, 1919 | A. Placek | Work Holding Device | ||
| 1,433,861 | Oct. 31, 1922 | A. Placek, F.J. Vlchek | Tool Quenching Tank and the Like | ||