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| Patents for L. Hauerstein | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,252,082 | Jan. 01, 1918 | A. Bock | Cutting Tool | stonemason | |
| 1,252,132 | Jan. 01, 1918 | C.M. Madsen | Offset for Saw Mill Carriages | sawmill carriages | |
| 1,278,653 | Sep. 10, 1918 | H.F. Hoffman | Pipe & Nut Wrench | pipe wrenches | |