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| Patents for Alfred M. Harrison | |||||
| Number | Date | Patentee | Title | Type | |
| 737,619 | Sep. 01, 1903 | A.M. Harrison | Shaft Connecting Device for Change Gears | metalworking speed changing mechanisms | |
| 741,789 | Oct. 20, 1903 | A.M. Harrison | Shaft Connecting Device for Change Gears | metalworking speed changing mechanisms | |