TELEPHONE EXCHANGE SYSTEM,申请号CAD297841-传众专利搜索

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发明名称	TELEPHONE EXCHANGE SYSTEM
摘要
申请公布号	CA297841(A)	申请公布日期	1930.02.25
申请号	CAD297841	申请日期
申请人	THE WESTERN ELECTRIC COMPANY	发明人	HERBERT EDWARD BRAGG
分类号		主分类号
代理机构		代理人
主权项
地址

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