Auxiliary base and switch attachment for telephones,申请号US19290400761-传众专利搜索

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法人/股东/高管

发明名称	Auxiliary base and switch attachment for telephones
摘要
申请公布号	US1783936(A)	申请公布日期	1930.12.02
申请号	US19290400761	申请日期	1929.10.19
申请人	JOHANNING CARLOS F	发明人	JOHANNING CARLOS F.
分类号	H04M1/02;H04M1/22;H04M1/52	主分类号	H04M1/02
代理机构		代理人
主权项
地址

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