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Patents for Erling Klafstad
Patents 1 - 4 of 4
Number	Date	Patentee	Title	Type
2,101,682	Dec. 07, 1937	E. Klafstad	Relief Valve	steam safety valves
2,183,650	Dec. 19, 1939	G.L. Gundersen, E. Klafstad	Relief Valve	steam safety valves
2,287,433	Jun. 23, 1942	E. Klafstad	System for Safeguarding the Operation of Steam Boilers	steam safety valves
2,355,916	Aug. 15, 1944	E. Klafstad	Relief Valve	steam safety valves

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