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All Patents in class 340/404.3
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
787,422	Apr. 18, 1905	F.L. Wolfe	Whistle Valve	steam valves
873,822	Dec. 17, 1907	F.L. Wolfe	Whistle Valve	valves

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