Diaphragm ear valve,申请号US19730413498-传众专利搜索

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发明名称	Diaphragm ear valve
摘要
申请公布号	USRE28560(E)	申请公布日期	1975.09.30
申请号	US19730413498	申请日期	1973.11.07
申请人		发明人
分类号	A61F11/08	主分类号	A61F11/08
代理机构		代理人
主权项
地址

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