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发明名称	TELEPHONE SUPERVISORY SYSTEM
摘要
申请公布号	CA317613(A)	申请公布日期	1931.12.01
申请号	CAD317613	申请日期
申请人	THE ASSOCIATED TELEPHONE AND TELEGRAPH COMPANY	发明人	OSCAR C. LEVY;CLARENCE E. LOMAX
分类号		主分类号
代理机构		代理人
主权项
地址

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