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| Patents for Wais & Roos | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 271,956 | Feb. 06, 1883 | C. Wais | Sheet-metal-shearing machine | |
 | 312,236 | Feb. 10, 1885 | C. Wais | Sheet-metal-cutting machine | |
 | 373,033 | Nov. 08, 1887 | C. Wais | Sheet-metal-shearing machine | |