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| All Patents in class 254/310 | |||||
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| Number | Date | Patentee | Title | Type | |
| 58,069 | Sep. 18, 1866 | Z.E. Coffin | Improved capstan-windlass | boats and ships | |
| 1,806,433 | May 19, 1931 | G.E. Weaver, A.J. Vettel | Wreck crane | vehicle mechanic | |
| 2,465,594 | Mar. 29, 1949 | H. Knutson | Steam Winch | steam hoists and winches | |