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| All Patents in class 156/224 | |||||
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| Number | Date | Patentee | Title | Type | |
| 601,993 | Apr. 05, 1898 | C. Wittkowsky | Method of manufacturing casks or barrels from veneers | barrel making machines | |
| 1,953,897 | Apr. 03, 1934 | F.W. Hodges | Carburetor | carburetors | |