METHOD OF USING PUBLIC SUBSCRIBER TELEPHONE NETWORK; SYSTEM AND APPARATUS,申请号CA19740207691-传众专利搜索

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发明名称	METHOD OF USING PUBLIC SUBSCRIBER TELEPHONE NETWORK; SYSTEM AND APPARATUS
摘要
申请公布号	CA999389(A)	申请公布日期	1976.11.02
申请号	CA19740207691	申请日期	1974.08.23
申请人	TRELL, ANDERS E.	发明人	TRELL, ANDERS E.
分类号		主分类号
代理机构		代理人
主权项
地址

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