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| All Patents in class 414/615 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,007,343 | Oct. 31, 1911 | W.T. Krausch, R. Elder | Hoisting Mechanism | hoists, winches, come-alongs | |
| 1,705,885 | Mar. 19, 1929 | F.N. Whitesell | Automatic Feeder | conveyors and hoppers | |