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| All Patents in class 416/44 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,498 | Jun. 05, 1849 | C.B. Hutchinson | Improvement in windmills | wind power apparatus | |
| 2,496,169 | Jan. 31, 1950 | E. Lochman | Variable pitch propeller | ||