All Patents in class 137/244


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All Patents in class 137/244
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
2,336,603	Dec. 14, 1943	P.S. Russel, A.K. Foulds	Orifice Clearing Means	pipe and orifice cleaners
2,416,267	Feb. 18, 1947	W.S. Landon	Automatic Orifice Cleaning Device	pipe and orifice cleaners