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| Patents Granted on 1956-11-13 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,770,171 | Nov. 13, 1956 | A.D. Moncrieff | Gear Cutting Device | gear making machines | |
| 2,770,172 | Nov. 13, 1956 | B.P. Graves | Coolant Return System | ||