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| All Patents in class 29/DIG.59 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,405,922 | Feb. 07, 1922 | C. Knowles | Wheel Guard for Grinding Machines | grinding attachments | |
| 1,938,778 | Dec. 12, 1933 | L.F. Nenninger | Cutter Guard | milling machine accessories | |