Call transmitter for interstate telephone communication,申请号US19450616621-传众专利搜索

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发明名称	Call transmitter for interstate telephone communication
摘要
申请公布号	US2434959(A)	申请公布日期	1948.01.27
申请号	US19450616621	申请日期	1945.09.15
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	RICHARD CHARLES D.
分类号	H04M1/274	主分类号	H04M1/274
代理机构		代理人
主权项
地址

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