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| Patents for Alexander D. F. Moncrieff | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,618,189 | Nov. 09, 1971 | A.D. Moncrieff | Gear Making | gear making machines | |
| 3,618,459 | Nov. 09, 1971 | A.D. Moncrieff | Gear Making | gear making machines | |