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All Patents in class 277/502
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
933,698	Sep. 07, 1909	G.L. Crook	Valve	internal combustion engine valves
1,229,459	Jun. 12, 1917	C.B. Jahnke, F.G. Hobart	Suction-valve holder	internal combustion engine valves

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