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| Patents for Louis F. Polk | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,412,421 | Dec. 10, 1946 | W.F. Aller, L.F. Polk | Gauging Device | measurement gauges | |
| 2,436,528 | Feb. 24, 1948 | L.F. Polk, W.F. Aller | Screw Thread Gauge | thread gages | |