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| All Patents in class 431/32 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,356,928 | Aug. 29, 1944 | A.G. Hann | Control Device | ||
| 2,449,237 | Sep. 14, 1948 | W.S. Landon | Fuel Feeding Apparatus | ||
| 2,493,297 | Jan. 03, 1950 | W.S. Landon | Orifice Cleaning Means | ||