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| Patents for Frank J. Vlchek | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,954,157 | Apr. 10, 1934 | F.J. Vlchek | Drop Hammer | drop hammers | |
| 1,956,885 | May 01, 1934 | F.J. Vlchek | Drop Hammer | drop hammers | |