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| Patents for W. Haupt | |||||
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| Number | Date | Patentee | Title | Type | |
| 490,432 | Jan. 24, 1893 | W. Gerhardt | Vise | ||
| 601,993 | Apr. 05, 1898 | C. Wittkowsky | Method of manufacturing casks or barrels from veneers | barrel making machines | |