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| All Patents in class 125/11.18 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,522,465 | Jan. 06, 1925 | G.C. Kimmel | Internal Grinding Machine | internal grinders | |
| 1,872,667 | Aug. 23, 1932 | W.J. Bryant | Work sizing | grinders | |