Telephone transmission circuits,申请号US19340752150-传众专利搜索

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发明名称	Telephone transmission circuits
摘要
申请公布号	US2043403(A)	申请公布日期	1936.06.09
申请号	US19340752150	申请日期	1934.11.08
申请人	AMERICAN TELEPHONE AND TELEGRAPH COMPANY	发明人	WRIGHT SUMNER BISBEE;ABRAHAM LEONARD GLADSTONE
分类号	H04B3/20	主分类号	H04B3/20
代理机构		代理人
主权项
地址

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