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| All Patents in class 254/305 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,141,679 | Jun. 01, 1915 | W.A. Barker | Electrically-driven hoist | hoists, winches, come-alongs | |
| 1,395,850 | Nov. 01, 1921 | H. McLaren | Cable Reciprocating Apparatus | plows | |
| 1,806,433 | May 19, 1931 | G.E. Weaver, A.J. Vettel | Wreck crane | vehicle mechanic | |