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| All Patents in class 254/361 | |||||
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| Number | Date | Patentee | Title | Type | |
| 276,076 | Apr. 17, 1883 | W.H. Ridgway | Elevator | hoists, winches, come-alongs | |
| 2,853,273 | Sep. 23, 1958 | O.O. Berge | Rope drum device | ||