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| Patents for Frank B. Hoffman | |||||
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| Number | Date | Patentee | Title | Type | |
| 820,215 | May 08, 1906 | J.D. Leffel | Depth Stop for a Plane for Backing Out Molding | plane depth stops | |
| 979,330 | Dec. 20, 1910 | J.C. Noll | Wrench | quick adjust wrenches | |