Party line telephone system,申请号US19450584060-传众专利搜索

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发明名称	Party line telephone system
摘要
申请公布号	US2490054(A)	申请公布日期	1949.12.06
申请号	US19450584060	申请日期	1945.03.22
申请人	INTERNATIONAL STANDARD ELECTRIC CORPORATION	发明人	HATTON WILLIAM
分类号	H04Q5/06	主分类号	H04Q5/06
代理机构		代理人
主权项
地址

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