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Patents for Carl Wittkowsky | |||||
Number | Date | Patentee | Title | Type | |
379,301 | Mar. 13, 1888 | C. Wittkowsky | Method of manufacturing wooden relief-plates | specialty woodworking machines | |
601,993 | Apr. 05, 1898 | C. Wittkowsky | Method of manufacturing casks or barrels from veneers | barrel making machines |