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| All Patents in class 83/280 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,110,810 | Sep. 15, 1914 | C.D. McDonald | Metal-shearing machine | ||
| 1,141,644 | Jun. 01, 1915 | C.D. McDonald | Metal-shearing machine | ||
| 1,174,747 | Mar. 07, 1916 | C.D. McDonald | Metal-shearing machine | ||