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| All Patents in class 431/60 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,626,116 | Apr. 26, 1927 | F. Hardinge | Oil burner | industrial furnaces | |
| 2,356,928 | Aug. 29, 1944 | A.G. Hann | Control Device | flow controls | |