All Patents in class 137/416


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All Patents in class 137/416
Patents 1 - 3 of 3
Number	Date	Patentee	Title	Type
2,230,911	Feb. 04, 1941	P.S. Russel	Control Device	flow controls
2,497,223	Feb. 14, 1950	W.S. Landon	Orifice Cleaning Means	pipe and orifice cleaners
2,592,913	Apr. 15, 1952	M.E. Landon, Administratrix, W.S. Landon, deceased (Estate of)	Liquid Level Control Means	liquid level controls