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| Patents for Fidelis Maichen | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,336,754 | Apr. 13, 1920 | R. Parmelee | Vise | pipe and chain vises | |
| 1,336,755 | Apr. 13, 1920 | R. Parmelee | Vise | pipe and chain vises | |