Improvements in respiratory appliances,申请号GB19370020218-传众专利搜索

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发明名称	Improvements in respiratory appliances
摘要
申请公布号	GB499813(A)	申请公布日期	1939.01.23
申请号	GB19370020218	申请日期	1937.07.21
申请人	SOCIETE INDUSTRIELLE DES TELEPHONES	发明人
分类号	A62B23/02	主分类号	A62B23/02
代理机构		代理人
主权项
地址

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