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| All Patents in class 254/347 | |||||
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| Number | Date | Patentee | Title | Type | |
| 802,844 | Oct. 24, 1905 | C.A. Baechtold, H.N. Covell | Reversible driving device | hoists, winches, come-alongs | |
| 967,331 | Aug. 16, 1910 | H.N. Covell | Winch | hoists, winches, come-alongs | |
| 1,559,856 | Nov. 03, 1925 | M.H. Dickinson | Loading engine | tree felling machines | |