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| All Patents in class 336/65 | |||||
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| Number | Date | Patentee | Title | Type | |
| 30,038 | Sep. 18, 1860 | J.K. Babcock | Improvement in windmills | wind power apparatus | |
| 1,540,789 | Jun. 09, 1925 | C.M. McCord | Testing transformer | transformers | |