Telephone system having preset transmitter,申请号US19470780440-传众专利搜索

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发明名称	Telephone system having preset transmitter
摘要
申请公布号	US2534850(A)	申请公布日期	1950.12.19
申请号	US19470780440	申请日期	1947.10.17
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	BOWNE LANGFORD J.
分类号	H04M1/274;H04Q3/00	主分类号	H04M1/274
代理机构		代理人
主权项
地址

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