AUTOMATIC TELEPHONE SWITCHING SYSTEM INCLUDING DIFFERENT KINDS OF BUSY TONE SOURCES,申请号CAD913818-传众专利搜索

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发明名称	AUTOMATIC TELEPHONE SWITCHING SYSTEM INCLUDING DIFFERENT KINDS OF BUSY TONE SOURCES
摘要
申请公布号	CA913818(A)	申请公布日期	1972.10.31
申请号	CAD913818	申请日期
申请人	HITACHI, LTD.	发明人	KAZUO ITOH;CHIKAI II;HIROTAKA USUDA
分类号		主分类号
代理机构		代理人
主权项
地址

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