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| All Patents in class 607/65 | |||||
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| Number | Date | Patentee | Title | Type | |
| 372,441 | Nov. 01, 1887 | W.W. Roovers, P.G. Williams | Coin operated induction coil | ||
| 1,376,080 | Apr. 26, 1921 | C.W. De Mooy | High-frequency machine | ||
| 1,376,081 | Apr. 26, 1921 | C.W. De Mooy | High-frequency Generator of the Transformer Type | electric generators | |