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| All Patents in class 254/380 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,913,224 | Nov. 17, 1959 | G. Uhlig | Winch | hoists, winches, come-alongs | |
| 3,125,200 | Mar. 17, 1964 | F.A. Kaman | Pneumatic hoist | ||
| 4,555,093 | Nov. 26, 1985 | J.J. Plummer | Cable pulling device with force indicator and overload protection | electrical conduit apparatus | |