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| All Patents in class 254/378 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,465,594 | Mar. 29, 1949 | H. Knutson | Steam Winch | steam hoists and winches | |
| 2,495,463 | Jan. 24, 1950 | R.G. Tourneau | Power winch | hoists, winches, come-alongs | |
| 3,125,200 | Mar. 17, 1964 | F.A. Kaman | Pneumatic hoist | ||