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| All Patents in class 476/9 | |||||
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| Number | Date | Patentee | Title | Type | |
| 381,215 | Apr. 17, 1888 | E.N. Collett | Reversing-gear for saw-mills | sawmill feed works | |
| 2,617,309 | Nov. 11, 1952 | W.G. Tyson, K.H. Casson | Variable-speed friction drive | ||