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| All Patents in class 83/151 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,598,919 | Sep. 07, 1926 | C.D. McDonald | Metal-shearing machine | ||
| 2,236,193 | Mar. 25, 1941 | M.W. Hazelton | Shearing Machine | metal shearing machines | |