KEY OPERATED TELEPHONE CALL TRANSMITTER,申请号CAD427452-传众专利搜索

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发明名称	KEY OPERATED TELEPHONE CALL TRANSMITTER
摘要
申请公布号	CA427452(A)	申请公布日期	1945.05.08
申请号	CAD427452	申请日期
申请人	BELL TELEPHONE LABORATORIES;WESTERN ELECTRIC COMPANY, INCORPORATED	发明人	CHARLES DONAT RICHARD
分类号		主分类号
代理机构		代理人
主权项
地址

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