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| Patents for Frank N. Bretthauer | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,742,063 | Apr. 17, 1956 | F.N. Bretthauer | Guard for table saws | tablesaw accessories | |
| 3,104,688 | Sep. 24, 1963 | F.N. Bretthauer | Band saw guard | bandsaw accessories | |
| 3,741,063 | Jun. 26, 1973 | F.N. Bretthauer | Adjustable jig for portable electric saws | ||