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| All Patents in class 254/344 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,396 | Apr. 24, 1849 | J.E. Andrews | Variable-power capstan | boats and ships | |
| 771,761 | Oct. 04, 1904 | T. Barrow | Power Hoist | hoists, winches, come-alongs | |
| 1,155,784 | Oct. 05, 1915 | W.A. Barker | Hoisting-machine | hoists, winches, come-alongs | |
| 2,853,273 | Sep. 23, 1958 | O.O. Berge | Rope drum device | ||
| 3,125,200 | Mar. 17, 1964 | F.A. Kaman | Pneumatic hoist | ||