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All Patents in class 137/77
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
2,860,649	Nov. 18, 1958	D.L. Billian	Emergency shut-off valve
2,867,228	Jan. 06, 1959	R.V. Klikunas, F.F. Rike	Emergency shut-off valve

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