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| All Patents in class 137/389 | |||||
| Number | Date | Patentee | Title | Type | |
| 2,379,565 | Jul. 03, 1945 | E.J. Doucet | Fuel Burner Control Means | flow controls | |
| 2,389,519 | Nov. 20, 1945 | W.S. Landon | Burner Control Means | flow controls | |
| 2,518,339 | Aug. 08, 1950 | W.S. Landon | Flow Control Means | flow controls | |
| 2,566,216 | Aug. 28, 1951 | W.S. Landon | Flow Control Means | flow controls | |
| 2,592,913 | Apr. 15, 1952 | M.E. Landon, Administratrix, W.S. Landon, deceased (Estate of) | Liquid Level Control Means | liquid level controls | |