Nonreturn valve for breathing appliances,申请号US19280283703-传众专利搜索

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发明名称	Nonreturn valve for breathing appliances
摘要
申请公布号	US1867478(A)	申请公布日期	1932.07.12
申请号	US19280283703	申请日期	1928.06.07
申请人	FIRM DRAGERWERK, HEINR. & BERNH. DRAGER	发明人	STELZNER HERMANN
分类号	A61M16/20;F16K15/14	主分类号	A61M16/20
代理机构		代理人
主权项
地址

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