Duplex automatic air vent valve,申请号US19280317402-传众专利搜索

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发明名称	Duplex automatic air vent valve
摘要
申请公布号	US1818053(A)	申请公布日期	1931.08.11
申请号	US19280317402	申请日期	1928.11.05
申请人	JOSEPH ELGER	发明人	ELGER JOSEPH
分类号	F24D19/08	主分类号	F24D19/08
代理机构		代理人
主权项
地址

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