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| All Patents in class 24/101B | |||||
| Number | Date | Patentee | Title | Type | |
| 1,239,352 | Sep. 04, 1917 | N.D. Chard | Lathe-center adjusting and clamping means | metal lathes | |
| 1,328,228 | Jan. 13, 1920 | A.O. Feilbach | Tool For Lifting Valve Springs | valve spring tools | |