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All Patents in class 137/500
Patents 1 - 3 of 3
Number	Date	Patentee	Title	Type
2,192,117	Feb. 27, 1940	D.D. Wile	Control Device	temperature controls
2,259,280	Oct. 14, 1941	D.D. Wile	Control Device	refrigeration apparatus
2,622,614	Dec. 23, 1952	W.A. Cox	Rate Valve	hydraulic apparatus

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