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| All Patents in class 74/401 | |||||
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| Number | Date | Patentee | Title | Type | |
| 79,605 | Jul. 07, 1868 | A. Sibley | Machine Gearing | industrial machine gearing | |
| 326,994 | Sep. 29, 1885 | M. Lafever | Traction Engine Gear | traction engine propulsion components | |
| 2,335,797 | Nov. 30, 1943 | J.H. Schreiber, F.H. Dean | Gear shift locking device | metal shapers | |